Topic 9

Question 1

What are atoms

Answer 1

smallest particles with the chemical properties of the elements

Question 2

What is the relative mass and charge of a proton, neutron and electron

Answer 2

Proton:
- Mass: 1
- Charge: 1+

Neutron:
- Mass: 1
- Charge: 0

Electron:
- Mass: 1/1840
- Charge 1-

Question 3

What is the overall nucleus charge

Answer 3

positive

Question 4

what is the overall atom charge

Answer 4

neutral

Question 5

What are isotopes

Answer 5

Atoms of the same element, same number of protons, different number of neutrons. Same chemical properties because of the same number of valence electrons, different physical properties because of different mass

Question 6

How is the amount of energy different in the different electron shells

Answer 6

1st shell: lowest energy level
2nd shell: higher energy than 1st shell
and so on

Question 7

What are valence electrons? (i.e where can they be found and what are their functions)

Answer 7

Found in the shell furthest from the necleus, involved in the formation of chemical bonds during chemical reactions and thus determines the chemical properties of the element