Things to Know: Chaper 2

Question 1

Basic building block of matter composed of electrons, neutrons and protons.

Answer 1

Atom

Question 2

The number of protons and neutrons in an atoms nucleus.

Answer 2

Atomic Mass Number

Question 3

Number of protons an atom contains in its nucleus.

Answer 3

Atomic Number

Question 4

Force of attraction that holds an atoms nucleus together and the electrons in orbit.

Answer 4

Binding Energy

Question 5

A substance that cannot be broken down into simpler parts by ordinary means.

Answer 5

Element

Question 6

Subatomic particle with 1 unit of negative electrical charge and mass of 9.109 x 10^-31 kg

Answer 6

Electron

Question 7

A defined energy level around the nucleus where electrons are held in orbit.

Answer 7

Electron Shell

Question 8

Subatomic particle with no electrical charge (neutral) and mass of 1.675 x 10-27 kg

Answer 8

Neutron

Question 9

Central core of the atom made up of protons and neutrons.

Answer 9

Nucleus

Question 10

Subatomic particle with 1 unit positive electrical charge and a mass of 1.673 x10^-27 kg

Answer 10

Proton