The atomic number of sulfur is 16. sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. based on the number of valance electrons in a sulfur atom, predict the molecular formula of the compound.
a. hs c. h2s
b. hs2 d. h4s

H2S.

Explanation:

Ions may be defined as the element that contains either positive or negative charge over them. Two types of ions are cations and anions. The outermost electrons are involved in the formation of ions.

The atomic number of sulfur is 16. Its outermost electronic configuration is K=2, L= 8, M= 6. The sulfur requres two more electrons to complete its orbit and accquire -2 charge.

H        S

+1        -2

Then, the formula will be H2S.

Thus, the correct answer is option (c).

the answer is "a.) well–developed vascular system."

explanation:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).