Group 1 The Alkali Metals & Group 7 The Halogens

Cards (17)

what are the first 3 elements of group 1 ?
lithium , sodium and potassium
why do group 1 metals all react the same ?
because they all have 1 outer electron
describe a physical property if group 1 elements ?
soft and shiny metals
as you go down the group 1 the melting point decreases
as you go down the group 1 the density increases
group 1 metal + water becomes ?
metal hydroxide + hydrogen
as you go down the group 1 the reactivity increases
what is another name for group 1 ?
the alkali metals
what is another name for group 7 ?
the halogens
as you go down group 7 the colour gets darker
as you go down group 7 the melting and boiling point increases
as you go down group 7 the density increases
describe the halogen chlorine ?
pale yellow/ green gas at room temperature
very reactive and poisonous gas
describe the halogen bromine ?
red/ brown liquid at room temperature
reactive, dense and poisonous gas
describe the halogen iodine ?
grey solid at room temperature
shimmery, crystalline solid
forms a purple vapour
why does the reactivity of group 7 decrease down the group ?
the electrons further away from nucleus so weaker electrostatic forces of attraction making it harder to attract an incoming electron
do halogens exist as diatomic molecules ?
Yes