7 Particles

Question 1

State the three subatomic particles

Answer 1

Protons, neutrons, electrons

Question 2

State the masses of the subatomic particles

Answer 2

Protons: 1, neutrons: 1, electrons: 0

Question 3

State the relative charges of the subatomic particles

Answer 3

Protons: +1, neutrons: 0, electrons: -1

Question 4

How do you calculate the number of neutrons in an atom on the periodic table?

Answer 4

Mass number - atomic number

Question 5

What is atomic number?

Answer 5

The number of protons in the atom (the smaller number on the bottom)

Question 6

What is mass number?

Answer 6

The number of protons + number of neutrons

Question 7

Why do atoms have no overall charge?

Answer 7

Because they have the same number of electrons as protons so the charges cancel each other out.

Question 8

Sodium has a mass number of 23, and an atomic number of 11. How many electrons, protons and neutrons?

Answer 8

11 protons, 11 electrons, 12 neutrons

Question 9

Aluminium has a mass number of 27, and an atomic number of 13. How many electrons, protons and neutrons?

Answer 9

13 protons, 13 electrons, 14 neutrons

Question 10

How does the size of the nucleus compare to the size of the atom?

Answer 10

Nucleus is very very small compared to the size of the atom

Question 11

What are the similarities and differences between isotopes?

Answer 11

Same number of protons but a different number of neutrons.