Unit 2 Chem - Atomic Theory Review

Question 1

In the gold foil experiment, most of the particles fired at the foil....

Accepted Answer

passed through the foil

Question 2

Which has more electrons?

Accepted Answer

Ca2-

Question 3

Aluminum has 13 protons, how many electrons will it have if Al is a pure element?

Accepted Answer

13

Question 4

Who ran the gold foil experiment that explained positively charged particles?

Accepted Answer

E. Rutherford

Question 5

What subatomic particle did Niels Bohr work with?

Accepted Answer

Electrons

Question 6

The gold foil experiment lead to the discovery of...

Accepted Answer

nucleus

Question 7

Heisenberg and Schrodinger contributed to which theory?

Accepted Answer

Quantum

Question 8

Magnesium has a mass number of 24. If it has 12 protons, how many neutrons does it have?

Accepted Answer

12

Question 9

The Cathode Ray Experiment (JJ Thompson) lead to the discovery of what subatomic particle?

Accepted Answer

electron

Question 10

How is mass number calculated?

Accepted Answer

Mass # = # Neutrons + # Protons

Question 11

The subatomic particle with the same mass as a proton, but has a neutral charge is..

Accepted Answer

neutron

Question 12

What subatomic particles are located in the nucleus?

Accepted Answer

Protons and Neutrons

Question 13

Ga has 31 electrons. How many protons does it have?

Accepted Answer

31

Question 14

An isotope changes what about the atom?

Accepted Answer

Mass number

Question 15

What was the conclusion of the gold foil experiment?

Accepted Answer

Atoms contain a small, dense, positively charged nucleus

Question 16

What do electrons predict for an atom?

Accepted Answer

Reactivity

Question 17

Isotopes of an element contain different number of

Accepted Answer

Neutrons

Questions 17