Chemistry Module 3 review

Question 1

If the nucleas was the size of a marble, about how big would the electron cloud be?

Accepted Answer

a professional football stadium

Question 2

What did Rutherford notice about a small number of the alpha particles that he shot at the gold foil?

Accepted Answer

They had major deflections

Question 3

The sum of the protons and neutrons is the _________.

Accepted Answer

mass number

Question 4

A Carbon isotope consists of 6 protons, 7 neutrons, and 6 electrons. Its mass number is ____

Accepted Answer

13

Question 5

How many electrons are in a neutral atom of Sodium?

Accepted Answer

11

Question 6

Which nuclear particle has about the same mass as a neutron, but has a positive charge

Accepted Answer

proton

Question 7

Which subatomic particle has the lowest mass

Accepted Answer

electron

Question 8

What are two atoms called that have the same number of protons and a different number of neutrons?

Accepted Answer

isotopes

Question 9

What is emmited when gamma radiation is given off?

Accepted Answer

energy

Question 10

Who was the greek philosopher that first gave atoms their name?

Accepted Answer

Democratus

Question 11

An element consistes of 25% x - 15, and 75 % x - 16. What is average atomic mass of that element.

Accepted Answer

15.75

Question 12

The electron was discovered using _______

Accepted Answer

cathode ray tubes

Question 13

What element has a mass number of 82 and 46 neutrons?

Accepted Answer

Krypton

Question 14

The number of protons is equal to the ________

Accepted Answer

atomic number

Question 15

Which of these was not part of Dalton's atomic theory?

Accepted Answer

The number of protons and electrons are equal in a neutral atom.

Question 16

The unit amu is based on the 1/12th the mass of what isotope

Accepted Answer

Carbon - 12

Question 17

What is the most common isotope of Hydrogen?

Accepted Answer

protium, Hydrogen - 1

Question 18

Which particle(s) are located in the nucleus?

Accepted Answer

protons and neutrons

Question 19

Chlorine - 35 has how many protons, neutrons, and electrons.

Accepted Answer

17 protons, 18 neutrons, and 17 electrons

Question 20

Which isotope of Chlorine is more common? Chlorine - 35 or Chlorine - 37?

Accepted Answer

Chlorine - 35

Questions 20