Question 1
An incorrect statement about the alkaline earth metals is
◦ Melting points generally decrease as one descends the group.
◦ Densities are less than those of the corresponding alkali elements of the same period.
◦ The first ionization energy is less than that of the second ionization energy.
◦ Ionic radii of the M
2+ ion increases as one descends the group.
Question 2
Which is
not generally considered to be a chemical reaction of the alkaline earth metal calcium?
◦ Ca(
s) + O
2(
g) → CaO
2(
s)
◦ 2 Ca(
s) + 2 H
2O(
l) → 2 Ca(OH)
2(
aq) + H
2(
g)
◦ 6 Ca(
s) + 2 N
2(
g) → 2 Ca
3N
2(
s)
◦ Ca(
s) + Cl
2(
g) → CaCl
2(
s)