Atomic Structure

Question 1

Name the 3 particles inside an atom

Answer 1

Protons
Neutrons
Electrons

Question 2

Where are the electrons in terms of the nucleus

Answer 2

Far apart and orbiting the nucleus

Question 3

What makes up the nucleus of an atom

Answer 3

Protons and neutrons

Question 4

How do you work out the neutrons in an atom

Answer 4

Mass number - atomic number

Question 5

How do you work out the protons and electron in an atom

Answer 5

= the atomic number

Question 6

How does an isotope differ from a normal atom

Answer 6

It has more neutrons in the nucleus

Question 7

How many electrons does shell 1 hold

Answer 7

2

Question 8

How many electrons does shell 2 hold

Answer 8

8

Question 9

How many electrons does shell 3 hold

Answer 9

8

Question 10

How many electrons does shell 4 hold

Answer 10

2

Question 11

How do you draw electron structure

Answer 11

The electrons fill the shells closest to the nucleus unless there is no space left in those shells

Question 12

What is the radius of an atom?

Answer 12

0.1 nanometres

Question 13

Give 5 Electron shell rules:

Answer 13

1) electrons always occupy shells (often called energy levels
2) the lowest energy levels are always filled first
3) 1st shell: 2 2nd Shell: 8 3rd Shell: 8
4) Atoms are better with full electron shells
5) In most atoms the outer shell is not full which makes the atom want to react to fill it.