Chemistry High School

9. Name the element which has the following numbers of particles:
I

9. Name The Element Which Has The Following Numbers Of Particles:I

Answers

Answer 1

A. iron

B. iodine

C. Helium

D. calcium

E. lead

F. hydrogen

check your periodic table to see if they are correct

atomic number, proton number and electron are the same

to find neutron = mass number - atomic number

Related Questions

HELP ME PLZZZ

SMNSNSNS
D
D
D
D
D
D

D
D
D
D

Answers

Answer:

#1 is C, #2 is D, #3 is A

Explanation:

How are elements arranged on the periodic table?

Question 10 options:

boiling point

atomic mass (# of protons and neutrons)

density

atomic number (# of proton

Answers

Answer: They are arranged by atomic number.

Saliva, produced by glands in the mouth, plays an important role in the digestion of food. Saliva contains a chemical, called amylase, that breaks down starch in the food we eat. A scientist conducts an experiment to investigate at which temperatures amylase works the best. He hypothesizes that the reaction will occur fastest if the amylase reaction is conducted near the normal human body temperature of 37ºC (degrees Celsius). In order to test his hypothesis, the scientist measures the reaction rate, which is how fast the amylase breaks down the starch at six different temperatures. The reaction rate is rated on a scale of 0 to 10, with 0 meaning no reaction and 10 meaning the fastest reaction. The results are recorded in the data table.

AMYLASE REACTION RATE BY TEMPERATURE

Temperature (ºC)

Reaction Rate

0

2

20 4
40 10
60 8
80 2
100 0
Based on the data, should the scientist accept or reject his hypothesis?

Answers

Answer:

The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.

Explanation:

Copper has a density of 8.96 g/cm^3. What is the mass of a piece of copper with a volume of 2.62 cm^3?

Answers

Answer:

23.48

Explanation:

Good Luck!

Answer: 23.48 g

Explanation:

formula: mass = density x volume

Volume of copper = 2.62 cm^3

Density of copper = 8.96 g/cm^3

mass = 8.96 x 2.62 = 23.4752

I need help!!!!!!!!!!!!!!!

Answers

Answer:

I think the answer is A.

Explanation:

hope this helps.

Suppose you have samples of three unknown solids. Explain how you could use their properties to determine whether or not they are ionic solids.

Answers

Given a sample of three unknown solids, we would be able to deduce which are ionic solids by their melting and boiling points, conductivity in water, and the insulation they provide.

What are Ionic solids?An ionic solid is a solid formed by ionic bonds. They are the solid version of ionic compounds, which are held together by strong electrostatic energies.

What properties do they possess?Among their many properties, ionic solids possess high melting and boiling points.These solids are also known to conduct electricity well when dissolved into water, however, this can be tested after melting them as they will not conduct electricity in a solid state.A final property that we can use to identify them is that they provide a good means of insulation.Each of these properties can be tested and will allow us to determine the ionic solids amongst the samples.

Therefore, we can find the ionic solids amongst the samples by testing their melting and boiling points, conductivity in water, and the insulation they provide, given that each of these should provide high values to indicate an ionic solid.

To learn more about ionic solids visit:

https://brainly.com/question/157294?referrer=searchResults

why are we always at the center of a rainbow? and why can we see a rainbow?

Answers

Answer:

the sun is directly behind your head

Explanation:

The reason why we can see a rainbow is caused by sunlight and atmospheric conditions

What are some examples of a physical change? (list more than 2 examples)

Answers

Breaking glass
Cutting hair
Folding paper
Chopping wood
Melting ice

explain why almunium is often used for long distance over head electric cables (high voltage)​

Answers

Answer:

because it does not cost much and can be found easily.  due to their low resistance and excellent conductivity.

Explanation:

YOU WOULD BE A LITERAL LIFESAVER IF U HELP ME. THANK YOUUUU

Answers

Answer:

160 g

Explanation:

5 x 32 = 160g, but if according to the periodic table u provided it would be 5 x 32.06

Answer:

160.3 g S

Explanation:

The diagram below shows the Moon at four positions in its orbit around Earth

An observer on Earth could see a solar eclipse when the Moon is at position

Answers

the answer is position no. 4

Rank the following in terms of increasing ionization energy: Sulfur, oxygen, hydrogen, and fluorine.

Answers

Answer:

Ranked from lowest to highest:

Sulfur - 999.6 kJ/mol

Hydrogen - 13.5984 kJ/mol

Oxygen - 13.6181 kJ/mol

Fluorine - 17.4228 kJ/mol

(07.05 HC A scientist investigating electrically-charged objects has decided to test if the number of times you rub a cloth against a balloon increases the amount of time it will stick to the wall. She wrote down her variables in a table. Variable Description Test The numbers of times she rubbed the cloth against the balloon Outcome The length of times the balloon sticks to the wall Control The cloth used in the experiment What would be her hypothesis for this experiment? (2 points) If you stick the balloon to a wall, then it will become electrically charged and stay there for a long period of time If you change the cloth used to change a balloon
​

Answers

Answer: the answer is  b

Explanation:I took the test and got it

pls mark as brainliest if correct for you

Which statement below describes the behavior of a Molecules when a substance changes from a gas to liquid

Answers

Answer:

As a substance changes from a solid to a liquid to a gas, its molecules first the molecules are moving fast enough, they are able to "escape." They leave the surface of the liquid as gas molecules. Evaporation is not the only process that can change a substance from a liquid to a gas. The same change can occur through boiling.

Explanation:

hopfully this helps!

what should you do if your bunsen burner does not light after a few tries with the striker?

Answers

If the burner doesn't light after several strikes, turn the gas off at the source. Verify that you are generating sparks when striking the striker, and check that the barrel is all the way down and the needle valve is open by the specified amount. If these check out, the problem may be insufficient gas flow.

Explain why the melting temperature of boron trichloride is much lower than that of sodium chloride​

Answers

Boron trichloride has a simple molecular structure,
whereas sodium chloride has a giant ionic lattice
structure. The ionic bonding between oppositely
charged ions in NaCl is stronger than the covalent
intramolecular bonding in BCl3. Therefore, less energy
is required to break the intramolecular covalent bonds in
BCl3, hence a lower melting temperature.

9
Ammonia is manufactured from nitrogen and hydrogen by the Haber process.
N2(g) + 3H2(g)2NH3(g)
What is the percentage yield when 60 kg of ammonia is produced from 60 kg of hydrogen?
A
5.9%
B
17.6%
с
35.3%
D
50.0%

Answers

Answer:

B

17.6%

Explanation:

1. Percentage yield = (Actual yield/theoretical yield) x 100

2. You know actual yield of ammonia (60kg) so you need to work out theoretical yield.

3. mols of hydrogen = m/mr = 60,000/2 = 30,000 mols.

4. 3:2 ratio so (30,000/3) x 2 = 20,000 mols of Ammonia.

5. Therefore mass of ammonia = mr x mols = 20,000 x 17 = 340,000 grams

6. So percentage yield is (60,000/340,000) x 100 = 17.6

What are 2 substances that can CAN conduct electricity? Plz explain.

Answers

Answer:

[tex]\huge\color{magenta}\boxed{\colorbox{skyblue}{Answer ☘}}[/tex]

thє ѕuвѕtαncєѕ thαt cσnduct єlєctrícítч αrє cαllєd cσnductσrѕ.

thє єхαmplєѕ σf cσnductσrѕ αrє -

ѕílvєr cσppєr gσld

hσpє hєlpful~

~ єхhαuѕtєd zσmвíє

Answer:

There are two categories of materials that are good conductors of electricity: metals and plastics. Metals conduct in the solid state because they contain mobile electrons, or electrons that may move about freely. When a copper wire is utilized in an electrical circuit, electrons pass through it every time the switch is flipped...

Explanation:

SERIOUS INQUIRES ONLY
does anyone like pistachio ice cream? fr fr bc like everyone says it’s weird but it’s so good yk like fr. don’t just be answering me for point yo i’ll come after you.

Answers

Answer:

I feel it's an extremely underrated Ice cream flavor!

Explanation:

Answer:

it's pretty good

Explanation:

A nuclear _ is a large chamber where fuel rods are located

Answers

The answer is going to be a nuclear reactor

which bond shown are triple bonds

Answers

Answer:

Hey mate.....

Explanation:

This is ur answer.....

A triple bond is made of two pi bonds and one sigma bond. Examples of compounds with triple bonds include nitrogen gas, the cyanide ion, acetylene and carbon monoxide.

Hope it helps!

Brainliest pls!

Follow me! :)

what do you think will happen to the kidneys if any of these parts were damaged?

Answers

Answer:

When your kidneys are damage waste products and fluid can build up in your body. That can cause swelling in your ankles nausea weakness poor sleep and shortness of breath. so without treatement the damage can get worse and your kidney may eventually stop working.

Help with this worksheet please (24pts)

Answers

Atoms that loss or gain electrons are called ions. There are two types of ions: cations and anions.Here, 2+ represents that Calcium (Ca) should gain 2 more electrons so that its number equals to that of protons.3- represents that Nitrogen (N) should loss 3 electrons to equivalent with the number of protons.Here, anions are S^2-, P^3-, Se^2-, Br^-.While cations are Cr^3+, Ag^+, Li^+, Ba^2+.The number of protons of Magnesium (Mg) = 12The number of nuetrons of Mg = 12The number of electrons of Mg = 12

Hope you could get an idea from here.

Doubt clarification - use comment section.

which pair of atoms constitutes a pair of isotopes of the same element?

Answers

Answer:

element with same number of protons but different number of neutrons

brainliest plzzzzz

Explain why the melting temperature of boron trichloride is much lower than that of sodium chloride​

Answers

Boron trichloride has a simple molecular structure, whereas sodium chloride has a giant ionic lattice structure. The ionic bonding between oppositely charged ions in NaCl is stronger than the covalent intramolecular bonding in BCl3. Therefore, less energy is required to break the intramolecular covalent bonds in BCl3, hence a lower melting temperature

*
Which of the following is a acid
нСІ
NaOH
Naci
KOH
Please help I only have until 11:59 to turn in this assignment and I don’t know what I’m doing

Answers

Answer:

 The correct answer is option A, that is, HCl.  

An acid refers to an ion or molecule possessing the tendency of donating a hydrogen ion or a proton, or alternatively, exhibiting a tendency of producing a covalent bond with a pair of electrons. The aqueous Arrhenius acids exhibit characteristic features that offer a practical illustration of an acid.  

The acids can turn blue litmus paper red, can form aqueous solutions with a sour taste, and reacts with bases and some kind of metals to produce salts. One of the general aqueous acids is HCl (hydrochloric acid) that is found in the stomach and stimulates digestive enzymes.  

Explanation:

Which statement does NOT describe subduction zones?

A.
Earthquakes and volcanoes occur at these boundaries.

B.
Old crust is recycled into Earth's mantle.

C.
Volcanic mountains can form at these boundaries.

D.
New crust forms by seafloor spreading

Answers

the answer is C but i might be wrong

Who has an aesthetic room

Answers

Me I have a aesthetic room

What is the formula for the binary ionic compound formed between
zinc and nitrogen.

Answers

Answer: Zinc nitride (Zn3N2) is an inorganic compound of zinc and nitrogen, usually obtained as (blue)grey crystals. It is a semiconductor. In pure form, it has the anti-bixbyite structure.

Chemical formula: Zn3N2

Space group: Ia-3, No. 206

EC Number: 215-207-3

Appearance: blue-gray cubic crystals

Explanation:

What does it mean when the
frequency of a wave increases?

A. the amplitude increases
B. the amplitude decreases
C the wavelength becomes shorter
D. the wavelength becomes longer

Answers

Answer:

The answer is C

Can you put a brainliest for me

Explanation:

Answer:

the wavelength becomes shorter

Explanation:

frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Other Questions
The measure of an angle is 138. What is the measure of its supplementary angle? A golfer takes an uphill shot towards the hole, and they make the shot. The path of the ball can be modeled by the equation y=-5^2 40x 10, where x is the horizontal distance and y is the vertical distance traveled by the ball in meters. How much higher is the hole than the spot from where the shot was taken? The hole is meters higher What was the maximum height above the hole that the ball reached while it was in the air? meters The maximum height that the ball reached above the hole was What was the horizontal distance that the ball traveled from the point that the shot was taken to the hole? Round your ai the nearest tenth of a meter. meters. The horizontal distance covered by the ball was PLEASE HELP ME WITH THE MEANING OF THIS QUOTE: "She took careful stock of herself, then combed her hair and tied it back up again. Then she starched and ironed her face, forming it into just what people wanted to see, and opened up the window and cried, Come heah people! Jody is dead. Mah husband is gone from me." -- From "Their Eyes Were Watching God" by HustonComment on meaning. What would you phrases like the meaning of love . . . the importance of self-knowledge . . . developing and /or losing relationships How did the quote "hit home" with you and explain in a paragraph. What do I do when this happen??? The term ethics is best defined as_ PLS ANSWER!! Typically, books written in third personA. take the reader inside the main character's head.B. allow the reader to feel like an additional character.C. rely heavily on the use of pronouns such as "I," "me," and "my."D. have unlimited access to what all characters are feeling. What is the second step when critiquing art? Stuart McGregors goal was to be a chef, and he received a highly prestigious apprenticeship just before turning 17. Soon after starting his apprenticeship, he Experienced verbal abuse at work, and colleagues began making innuendos about his sexuality. He was once given a large bag of peas by the kitchen managers and asked to count them.McGregor was told by his colleagues that he was going to receive an award. Excitedly, he called his family and could not wait to receive the award later in the day. Unknown to him, however, his peers had broken into his car and stolen the knob of his gear stick. They then wrapped it up and gave it to him as his award in front of the entire staff.McGregor was regularly asked to perform tasks he did not know how to do and then was ridiculed when he did them incorrectly. Shortly before the conclusion of the apprenticeship period, he was invited to go on a camping trip with his workmates. Sadly, the kitchen managers threatened him with bodily harm if he went. McGregor was afraid for his safety and made excuses to avoid the trip.Another employee ultimately complained about being bullied, and investigators questioned McGregor about his experience. He denied being bullied, probably out of fear for his safety, fear of losing his job, or because he thought he could handle the situation.Consider how you might have resolved the situation faced by Stuart McGregor. Applying the 3-Step Problem-Solving Approach1. Define the problem in this case.2. Identify what OB concepts or theories help explain McGregors situation and reaction.3. Recommend what you would do if you were McGregor and also if you were the manager of therestaurant.Prepare a 15-minute PowerPoint presentation on your approach indicating the problem, the theories you will use to explain the problem and the recommendations you will suggest. Multiply: (3x)(x4 + 5) Write an informational essay explaining how George Mendel developed his theory of heredity 25 points!!!Why did some North Carolinians oppose the draft during the Civil War? Check all that apply.A) They wanted to enact conscription laws instead.B) They thought the draft mainly targeted the poor.C) They believed that the draft took away citizens individual rights.D) They worried about a potential harmful effect on the economy.E) They believed that a draft would not be enough to defend the South. (plz choose letters) Read the excerpt from a text about online learning. "Virtual schools were growing quite quickly," said Christina Martin, a policy analyst at the Cascade Policy Institute, a free-market think tank based in Portland, Ore. . . . The big issue, she said, was fairness. Some students have access to virtual schools because they have a learning coach to stay home with them, while others dont. Also, Internet connections can be costly, and not every family has one. And families have to pay for their own printing. . . . "An adult must stay with a child during the day and make sure theyre doing their work. " This information would best support a claim about students need for personal coaches. Internet supervision. High-tech gadgets. Equal access to technology. testing with a urine reagent test strip shows that a patients urine is positive for protein, negative for glucose and blood, and has a ph of 8.2. what will the nurse do in response to these results? e Savings and Loan Crisis in the 1980s was a result ofthe cost of the military.the federal budget surplus.the number of new taxes.the number of failing banks Write out the times (numerically) in Spanish below to show the correct time. Son las tres y media de la tarde. ________________________________________________Es el medioda. _________________________________________Es la medianoche. ________________________________________________Son las cinco y media de la maana. ________________________________________________Son las dos y cuarto. ________________________________________________Son las cuatro y veinticinco. ________________________________________________Es la una menos veinte de la tarde.________________________________________________Son las cinco menos cuarto de la madrugada. _____________________________________Son las ocho y veinte de la noche. ________________________________________________ WILL GIVE BRAINLIEST A data analyst is working with a data frame named retail. It has separate columns for dollars (price_dollars) and cents (price_cents). The analyst wants to combine the two columns into a single column named price, with the dollars and cents separated by a decimal point. For example, if the value in the price_dollars column is 10, and the value in the price_cents column is 50, the value in the price column will be 10.50. What code chunk lets the analyst create the price column Find the perimeter of the window to the nearest tenth 10cm If Sally has 5 apples and Joe has 2 more apples than Sally but Joe gets robbed how many apples does Sally and Joe have all together .I want a way to solve this question