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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

since electrons are negative the answer is neagtaive

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.