Answer:
1) They are highly reactive.
2) They are highly reactive and are non metallic.
3) -2
4)LiCl
5) How electrons are shared
6) Each hydrogen electron has one valence electron
7) share two valence electrons
8) 85.0 g/mol
Explanation:
1) As both the kind of elements are ready to give or taken one electron, to attain noble gas configuration or full filled stability, they are highly reactive.
The element which has just one electron in valence shell will give the electron easily.
The element which has seven valence electrons will accept one electron easily.
2) Halogen have seven valence electrons. They are highly reactive as the are ready to take one electron. As they cannot give electrons they are non metals.
3) Generally oxygen can accept two electrons so its charge is "-2"
4) Formula unit is generally for ionic compound. LiCl is an ionic compound.
5) In lewis structure we write elements are then distribute electrons over all the atoms. It shows the number of bonded electrons, unshared or lone electrons as well.
6) The configuration of hydrogen is 1s1, thus it has only one valence electron/ atom.
7) In each covalent bond there are two shared electrons (shared by two atoms bonded).
8) molar mass = atomic mass of Na + Atomic mass of N + 3 X atomic mass of O
Molar mass = 23 + 14 + 3(16) = 85.0 g/mol
