Counting Subatomic Particles

Question 1

Question 14) the symbol for sodium is Na and its atomic number is 11 how many protons does sodium have?

Answer 1

11
Atomic number is the same as protons (so is everything else except neutrons

Question 2

15) carbon has atomic number 6 and mass number 12 are how many neutrons does it have?

Answer 2

6
Neutrons + Atomic number = mass
6+6=12

Question 3

Oxygen has the atomic number of 8 how electrons does it have?

Answer 3

8 (same as atomic number)

Question 4

What’s chlorine’s atomic mass?

Answer 4

35 (periodic table on element)

Question 5

Atomic mass of magnesium is 24, atomic number is 12 how many neutron does it have?

Answer 5

12
Neutrons + protons = atomic mass
12+12= 24