C1 20 Questions

Question 1

State the masses of the sub-atomic particles.​

Answer 1

Proton 1, neutron 1, electron almost 0​

Question 2

State the relative charges of the sub-atomic particles.

Answer 2

Proton +1, neutron 0, electron -1

Question 3

What did the gold foil experiment prove?

Answer 3

That atoms have small a dense nucleus in the center with a positive charge

Question 4

What is the atomic number of an atom?

Answer 4

The number of protons in an atom

Question 5

What is the mass number of an atom?

Answer 5

The number of protons + the number of neutrons in an atom

Question 6

What did Chadwick discover?

Answer 6

The existence of neutrons

Question 7

What did Bohr’s experiments show?

Answer 7

That electrons are in specific shells (energy levels)

Question 8

What are isotopes?

Answer 8

Atoms of the same element with the same number of protons but a different number of neutrons

Question 9

What can the group number tell you about an atom of an element in that group?

Answer 9

The number of electrons in the outermost shell of the atom.

Question 10

What can the period number tell you about an atom of an element in that period?

Answer 10

The number of electron shells in the atom