Metals and non-metals in the periodic table

1 mark · Normal

Which statement correctly explains the similarity in chemical properties between lithium and potassium?

Show answer

Correct option: They are both in Group 1 and have the same number of outer-shell electrons.

Common mistakes: Confusing group with period; Believing same metal = same atomic mass

Show mark scheme and worked solution

Marking points

B1 · 1 mark · Correct option: 'They are both in Group 1 and have the same number of outer-shell electrons.'

Worked solution

Correct answer: They are both in Group 1 and have the same number of outer-shell electrons.