Periodic Table

Question 1

Features of the periodic table developed by Mendeleev

Answer 1

Left gaps
Arranged elements in groups and periods
Separated metals and non-metals

Question 2

Ways the periodic table today is different to Mendeleev’s

Answer 2

No gaps
Noble gases
Elements in increasing atomic number

Question 3

Properties of metals

Answer 3

Good conductors of electricity
Shiny solids
Good conductors of heat

Question 4

Properties of non-metals

Answer 4

Poor conductors of heat
Usually have low melting point
Poor conductors of electricity

Question 5

What are the trends descending in group 1

Answer 5

Bigger atoms
More dense
Even softer to cut
Lower melting/boiling point
More reactive - outer electron to be lost if further away from the positive charge of a nucleus

Question 6

Appearance of fluorine, chlorine, bromine and iodine at room temp

Answer 6

Pale yellow gas
Pale green gas
Red-brown liquid
Dark grey-black solid gives purple vapour

Question 7

What are the trends down group 7 (Halogens)

Answer 7

Bigger atoms
Less soluble
Increasing melting/boiling point
Less reactive

Question 8

Physical properties of chlorine gas

Answer 8

Pale green gas
Heavier
Toxic
Slightly soluble in water

Question 9

What colour is chlorine in potassium bromide and potassium iodide?

Answer 9

Bromide - colourless solution turns orange
Iodide - colourless solution turns brown

Question 10

What colour is bromine in potassium chloride and potassium iodide?

Answer 10

Chloride - no reaction
Iodide - orange solution turns brown

Question 11

What colour is iodine in potassium chloride and potassium bromide?

Answer 11

Chloride - no reaction
Bromide - no reaction

Question 12

How are transition metals different from group 1 metals?

Answer 12

Higher melting points
They have higher density
They are much less reactive with water