Atoms

Question 1

Alpha Particle charge

Answer 1

Positive

Question 2

Where are the Electrons located?

Answer 2

Around the nucleus, in the electron cloud

Question 3

Atoms are mostly __________

Answer 3

Empty space

Question 4

If helium has the atomic# of 3, how many protons does it have?

Answer 4

3 protons

Question 5

What does the Atomic # stand for?

Answer 5

of protons

Question 6

If helium has 3 protons, how many electrons does it have?

Answer 6

3 electrons

Question 7

What is the decimal at the botom of the letter stand for?

Answer 7

The average mass of all the isotopes of the element

Question 8

What is the decimal at the botom of the letter called?

Answer 8

Atomic mass

Question 9

What is the mass #?

Answer 9

sum of protons and electrons

Question 10

What was the Gold foil for?

Answer 10

A thin layer of atoms

Question 11

what did Rutherford’s expirement suggest?

Answer 11

That Atoms were mostly space, but did have solid particles, like the nucleus.

Question 12

What are the energy levels for electrons?

Answer 12

2, 8, and 8

Question 13

how much does 1 neutron weigh?

Answer 13

1 a.m.u

Question 14

How much does 1 electon weigh?

Answer 14

almo.st nothing

Question 15

how much does 1 proton weigh?

Answer 15

1 A.M.U

Question 16

How much does the nucleus weigh in percent vs the rest of the atom?

Answer 16

The nucleus is tiny, but ver very heavy. It takes up 99% of the atoms weigt.

Question 17

If H has an atomic mass of 8. 066, and an atomic number of 3, then how many neutrons does it have?

Answer 17

5 neutrons.

Question 18

What is the Isotope of an element?

Answer 18

2 atoms with othe same # of protons but with a diferent amount of neutrons

Question 19

If you had carbon 12 and Carbon 14, whats different about them?

Answer 19

They are Isotopes. Carbon 12 has 12 nuclei, but carbon 14 has 14 Nuclei

Question 20

Why is the atomic mass a decimal?

Answer 20

Because the atomic mass is the average mass of all isotopes.

Question 21

How many electrons does it take to equal 1 amu?

Answer 21

2,000 electrons = 1 A.M.U

Question 22

How is an element Identified?

Answer 22

By the number of protons. 2 atoms of the same element mus have the same # of protons, but the nuetron # can vary, thus creating Isotopes.

Question 23

Isotopes are identified by _____

Answer 23

the atomic mass

Question 24

The atomic # of Argon is 18. How many protons does it have?

Answer 24

18

Question 25

Scandium has 21 protons. what is its atomic #?

Answer 25

21

Question 26

The atomic # of copper is 29. It’s mass number is 64. How protons / Neutrons does it have?

Answer 26

20 protons, and 35 neutrons.

Question 27

if Choromine’s mass # is 52, and it has 24 protons, how many nuetrons does it have?

Answer 27

28

Question 28

between mass # and atomic #, which one talks of only one atom?

Answer 28

mass number.