The periodic table

Question 1

how is the periodic table arranged and which scientist is the periodic table mostly based off

Answer 1

in order of proton number

Mendeleev

Question 2

what do elements in the same groups have in common

Answer 2

the same number of electrons on their outer shell and similar properties

Question 3

what happens to boiling points as you go down group 1

Answer 3

it decreases because the size increases and the electrostatic forces get weaker from the nucleus to the outer shell and are easier to break down

Question 4

what happens to reactivity as you go down group 1

Answer 4

reactivity increases because atomic size increases and the forces between the nucleus and outer electron get weaker making it easier to lose

Question 5

what are 4 properties of the alkali metals

Answer 5

• soft
• very reactive
• low melting points
• 1 electron on the outer shell

Question 6

what is the difference between alkali metals and transition metals

Answer 6

transition metals are denser with higher melting points. they’re stronger and harder and don’t react as vigorously with oxygen and water

Question 7

what are the properties of transition metals

Answer 7

good conductors of heat and electricity, hard strong and have high densities and melting points

Question 8

what happens to reactivity as you go down group 7

Answer 8

reactivity decreases because atomic size increases so electrostatic forces between nucleus and outer shell are weaker making it harder to attract an electron

Question 9

why are halogens all diatomic

Answer 9

because they’re very reactive

Question 10

what are 3 properties of halogens

Answer 10

• poisonous in gaseous state
• Non-metals
• coloured vapour

Question 11

what colour vapour does 
fluorine
chlorine
bromine
iodine

have?

Answer 11

pale yellow/green
pale yellow/green
deep red
purplish pink