TOPIC 2 - Why are distress flares red? (Atoms)

Question 1

group 1

Answer 1

alkali metals

Question 2

group 7

Answer 2

halogens

Question 3

group 8/0

Answer 3

noble gases

Question 4

columns are called

Answer 4

groups

Question 5

rows are called

Answer 5

periods

Question 6

the two liquid elements

Answer 6

Bromine and Mercury

Question 7

air is 80%

Answer 7

nitrogen

Question 8

air is 20%

Answer 8

oxygen

Question 9

air is 0.04%

Answer 9

carbon dioxide

Question 10

mass and charge and location of protons

Answer 10

1 amu, +1, nucleus

Question 11

mass and charge and location of electrons

Answer 11

0 amu, -1, shell

Question 12

mass and charge and location of neutrons

Answer 12

1 amu, 0, nucleus

Question 13

number of protons =

Answer 13

atomic number = number of electrons

Question 14

number of electrons =

Answer 14

atomic number = number of protons

Question 15

atomic number =

Answer 15

number of protons = number of electrons

Question 16

mass number =

Answer 16

number of protons + number of neutrons

Question 17

number of neutrons =

Answer 17

mass number - atomic number

Question 18

the number at the top in nuclide notation is

Answer 18

mass number

Question 19

the number at the bottom in nuclide notation is

Answer 19

atomic number

Question 20

ram =

Answer 20

ram = ((%abundance of isotope 1 x mass) + (%abundance of isotope 2 x mass)) /100