1

What is the electron configuration of bromine? (Z=35)

1s²2p⁶2s² 3d¹⁰3p⁶3s²4f⁷

1s²1p⁶2s²2p⁶2d¹⁰3s²3p⁶ 3d¹

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵

1s²2s²2d⁶3s²3d⁶4s²3p¹⁰4d⁵

2

What is the most stable ion of calcium? (Z=20)

Ca⁺

Ca²⁺

Ca^-

Ca^2-

3

What is the most stable ionic compound formed by sodium (Z=11) and oxygen (Z=8)?

NaO

NaO₂

Na₂O₂

Na₂O

4

Draw one of the resonance structures of SO₃. The formal charge of S is:

– 1

0

+ 1

+ 2

5

What is the geometry of C₂Br₄?

linear

trigonal plan

tetrahedral

pyramidal

6

With regard to species ${}_{8}^{16}O^{2 -}$ and ${}_{10}^{20}{Ne}$ , which of the following statements is correct?

They have the same number of electrons

They have the same number of neutrons

They have the same number of protons

None of the above

Quiz | Structure and Bonding in Organic Molecules