Chemistry Key Words

Question 1

Neutron

Answer 1

Particles with no charge
Found in nucleus
Weighs 1 atomic mass unit

Question 2

Electron

Answer 2

Negatively charged
Found in shells
Weighs nothing.

Question 3

Electron shells

Answer 3

Energy levels around the nucleus.
1st shell can take 2 electrons
2nd shell can take 8
3rd shell can take 8

Question 4

Proton number (Atomic number)

Answer 4

Number of protons

Same as number of electrons

Question 5

Mass number

Answer 5

Number of protons + number of neutrons

Question 6

Electron configuration

Answer 6

Arrangement of electrons

Question 7

Element

Answer 7

One type of atom only

Question 8

Mixture

Answer 8

More than one type of atom, but not chemically joined

Question 9

Proton

Answer 9

Positively charged particle.
Found in the nucleus
Weighs 1 atomic mass unit

Question 10

Compound

Answer 10

More than one type of element, chemically joined by a bond

Question 11

Conservation of mass

Answer 11

In a closed container, the mass of the reactants is the same as the mass of the products