Module 1: Properties and Structure of Matter

Question 1

What colour flame does sodium (Na+) produce?

Answer 1

Yellow

Question 2

What colour flame does potassium (K+) produce?

Answer 2

Lilac

Question 3

What colour flame does calcium (Ca2+) produce?

Answer 3

Brick red (orange-red)

Question 4

What colour flame does strontium (Sr2+) produce?

Answer 4

Scarlet red

Question 5

What colour flame does Barium (Ba2+) produce?

Answer 5

Apple green (yellow-green)

Question 6

What colour flame does copper (Cu2+) produce?

Answer 6

Blue-green

Question 7

What is the purpose of the flame test?

Question 8

What is the alpha particle formula, symbol and what can it be stopped by

Answer 8

symbol - α
formula - He4/2 (4 on top 2 bottom)
Stopped by air

Question 9

What is the beta particle formula, and symbol and what can it be stopped by

Answer 9

symbol - β
formula - e- 0/-1 (0 on top -1 bottom)
Stopped thin sheets of aluminium

Question 10

What is the gamma-ray formula, and symbol and what can it be stopped by

Answer 10

symbol - γ
formula - e- 0/-1 (0 on top -1 bottom)
Gamma is not a particle, stopped by CMS of lead/concrete

Question 11

What are isotopes?

Answer 11

Isotopes- Different forms of the same element, can be stable or unstable
e.g Carbon has 6 neutrons, but can have 4, 6, or 8 neutrons

Question 12

what is electronegativity

Answer 12

Electronegativity is the strength of the attraction between a nucleus and valence electron

Question 13

What is ionisation energy?

Answer 13

The amount of energy required to remove a valence electron

Question 14

What is atomic radius

Answer 14

The distance between the nucleus and the valence electrons