Which two atoms form an ionic bond?
a. two sodium atoms
b. two oxygen atoms
c. sodium and bromine
d. fluorine and chlorine

Sodium and bromine

Explanation:

Ionic bond is a type of chemical bond and binds the chemical molecules together.  Ionic bond is formed by the transfer of electrons from an electropositive element ( metal) to the electronegative element (non metal).

Sodium is an electropositive element and contains one positive charge. Bromine is an electronegative element with a single negative charge over it. Sodium gives the electron to bromine and results in the formation of ionic bond.

Thus, the correct answer is option (C).

a. the production of carbon dioxide through the process of photosynthesis

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.