Chapter 3 Atomic Structure

Question 1

What are atoms?

Answer 1

Are the smallest particle that can still have the chemical characteristics of an element

Question 2

What are the subatomic particles?

Answer 2

Proton, neutron, electron

Question 3

Charge and relative mass of the subatomic particles?

Answer 3

Proton (+1, 1), neutron (0, 1), electron (-1, 1/1840 which is negligible )

Question 4

What is proton number?

Answer 4

Number of protons in an atom’s nucleus

Question 5

What is Nucleon number?

Answer 5

Total number of protons and neutrons in the nucleus

Question 6

What is an ion?

Answer 6

• It Is the particle formed when an atom or group of atoms gains or loses electrons but the number of protons and neutrons remains the same
• charged particles

Question 7

What are isotopes?

Answer 7

They are atoms of the same element that have the same proton number but different nucleon(mass) number. (Essentially different number of neutrons)

Question 8

What about the groups in the periodic table?

Answer 8

• elements in the same group have the same number of valence electrons (similar chemical reactions)

Question 9

What about the periods in the periodic table?

Answer 9

The elements in the same period have the same number of electron shells