❌ become more reactive, the larger the atom. This means the ❌ near the top of the group (lithium, sodium etc) are much ❌ reactive than those near the bottom of the group (rubidium, caesium etc). This is because the outer negative electron is ❌ from the positive nucleus, meaning it ❌ attractive force and so can be more easily lost.
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Alkali metals
Alkali metals
Halogen elements
Halogen elements
further away
further away
doesn't feel as much
doesn't feel as much
feels a lot more
feels a lot more