y10 test 2 - periodic table

Question 1

How does electronic configuration relate to periodic table position

Answer 1

The group number is No electrons in outer shells

Question 2

mendeleevs developments of the periodic table

Answer 2

• he moved the elements so they had similar properties to the elements around them
• left spaces for elements not yet discovered
• corrected the incorrect RAMs

Question 3

boiling point of bromine

Answer 3

60 degrees

Question 4

State (at room temp) and colour of fluorine

Answer 4

gas , yellow

Question 5

State (at room temp) and colour of chlorine in water and in cyclohexane

Answer 5

gas, colourless, pale green

Question 6

State (at room temp) and colour of bromine in water and in cyclohexane

Answer 6

liquid, orange, amber

Question 7

State (at room temp) and colour of iodine in water and in cyclohexane

Answer 7

solid, brown, pink-purple

Question 8

definition of oxidation

Answer 8

the oxidised substance loses electrons (and gains oxygen)

Question 9

definition of reduction

Answer 9

the reduced substance gains electrons (and loses electrons)

Question 10

definition of oxidising agent

Answer 10

it oxidises the other substance, reducing itself (it gains electrons)

Question 11

definition of reducing agent

Answer 11

it reduces the other substance, oxidising itself (it loses electrons0

Question 12

Trend in reactivity of group 1 metals

Answer 12

Increases in reactivity as it goes down. As the atoms get bigger, there are more shells and distance between outer electron and nucleus increases. This means the electrostatic forces of attraction are weaker so it’s easier to lose that electron and it’s more reactive.

Question 13

Trend in reactivity of group 7 metals

Answer 13

Decreases in reactivity as you go down the periodic table. The more shells there are, weaker the electrostatic forces of attraction so harder to attracts/gain an electron. Smaller atoms have stronger forces of attraction so r more reactive as it’s easier to attract the electron.