= 6.42 × 10²²
(scientific notation)
= 6.42e22
(scientific e notation)
= 64.2 × 10²¹
(engineering notation)
(sextillion; prefix zetta- (Z))
= 64200000000000000000000
(real number)
1.D 2.C 3.B 4.A is the answer i believe you're looking for.
Answer:
covalent bond- a chemical bond that is the sharing of electron pairs between atoms
B, C, D are compounds, while A and E are just element stand-alones.