Question

1 multiple choice 1 point
covalent bonds typically form between which types of elements?
noble gases
two metals
two nonmetals
metal and nonmetal
2 multiple choice 1 point
nonpolar covalent bonds occur when:
electrons are shared unevenly
atoms differ in electronegativity by ≥ 0.5
atoms differ in electronegativity by ≥ 0.5
they dont bond

Explanation:

Question 1

Covalent bonds involve sharing electrons. Noble gases are stable (full valence shells) and don't form bonds easily. Two metals form metallic bonds. Metal and nonmetal form ionic bonds (transfer electrons). Two nonmetals share electrons, so covalent bonds form between them.

Nonpolar covalent bonds have equal electron sharing (due to similar electronegativity). A difference < 0.5 means negligible polarity, so electrons are shared evenly. Differences ≥ 0.5 lead to polar covalent or ionic. "They don't bond" is incorrect.

Answer:

C. Two nonmetals

Question 2