Khan Academy

Question 1

12
C
6

Which element specifically is this.
Describe Protons & Neutrons

Answer 1

Carbon 12

6 Neutrons & 6 Protons

Question 2

14
C
6

Which element specifically is this?

Answer 2

Carbon 14

6 Protons

8 Neutrons

Question 3

1. amu or u is what in chemistry?
2. What does this number relate to?
3. What is the mathematical formula for this number?

Answer 3

Atomic mass unit

The weight of a Proton or Neutron

u = 1.660540 x 10 (-27)kg

Question 4

1
H
1.008

What are the top and bottom number called?

Answer 4

1 = Atomic number

1.008 = Average Atomic Mass