Question 1
An element with the general electron configuration for its outermost electrons of ns
2np
1 would be in which element group?
◦ 2A
◦ 3A
◦ 4A
◦ 5A
◦ 8A
Question 2
Arrange the following ions in order of decreasing ionic radius: Al
3+, Mg
2+, Na
+, O
2–.
decreasing radius →
◦ Al
3+> Mg
2+> O
2–> Na
+◦ Al
3+> Mg
2+> Na
+> O
2–◦ Na
+> Mg
2+> Al
3+> O
2–◦ O
2–> Al
3+> Mg
2+> Na
+◦ O
2–> Na
+> Mg
2+> Al
3+