Section 1.6 Atomic Structure

Question 1

What are the three subatomic particles?

Answer 1

Protons, neutrons, and electrons

Question 2

What are the relative charges for the subatomic particles?

Answer 2

Protons: Positive (+1)
Neutrons: No charge (0)
Electrons: Negative (-1)

Question 3

If there are three protons in the nucleus, can you say how many electrons or neutrons there are in the atom?

Answer 3

There are three electrons as each atoms contains equal number of protons and electrons.
You cannot tell how many neutrons there are without looking at the periodic table

Question 4

What is the atomic number and where can you find it on the periodic table?

Answer 4

The atomic number is the number of protons (therefore also electrons) there is in the nucleus of an atom
The atomic number is the number on the bottom of the element in the periodic table

Question 5

How is the periodic table arranged?

Answer 5

In order of the atomic number

Question 6

What is the mass number and where can you find it on the periodic table?

Answer 6

The mass number is the number of protons PLUS the number of neutrons in the nucleus of an atom
The mass number is the number on the top of the element in the periodic table

Question 7

Calculate the number of protons, neutrons and electrons in the following element:
Nitrogen: Atomic number = 7
Mass number = 14

Answer 7

Protons: 7
Neutrons: 7
Electrons: 7

Question 8

Calculate the number of protons, neutrons and electrons in the following element:
Chlorine: Atomic number = 17
Mass number = 35

Answer 8

Protons: 17
Neutrons: 17
Electrons: 18

Question 9

Calculate the number of protons, neutrons and electrons in the following element:
Silver: Atomic number = 47
Mass number = 108

Answer 9

Protons: 47
Neutrons: 47
Electrons: 61