Electronegativity. The covalent bond
Answers are for parents and teachers.
1
Arrange Cl, S, P, Si in order of increasing EN.
Si < P < S < Cl
2
Write the structural formula of CO₂ (carbon IV, oxygen II).
O=C=O
3
In the HF molecule which atom is partly negative and why?
Fluorine, because EN(F) = 4.0 > EN(H) = 2.20.
4
In the hydronium ion H₃O⁺ who is the donor, and why is the bond called donor–acceptor?
The donor is the oxygen of water (unshared pair), the acceptor is H⁺ (empty orbital).
5
Why are noble gas molecules single-atom?
Their outer shells are complete, so the atoms need no bonds.