How many electrons are shared in N2H4

24 Electrons

Explanation:

The total number should be 3+3×7 = 24 valence electrons, and the diagram has 26 electrons. Since we know the fluorine atoms will make a single bond and never make double bonds, the only solution is to remove the lone pair from the boron atom.

your answer is c

hope i ! ; )

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6