Answer:
question 2
Explanation:
group 13 boron group valence electrons:3
group 14 carbon group valence electrons: 4
group 15 pnictogens valence electrons: 5
group 16 chalcogens valence electrons: 6
question 7
hydrogen and helium
question 6
magnesium, calcium, barium, beryllium, strontium, radium, lithium, caesium, rubidium, francium, indium, scandium
question 1
sodium, lead, tin, mercury
question 3
hydrogen
helium
lithium
beryllium
question 4
beryllium
carbon
nitrogen
question 5
hydrogen - 1
hydrogen- 2
