Question

current attempt in progress
how many valence electrons do each of the following elements have?
(a) c
(b) s
(c) k
(d) i
(e) b

Explanation:

• For element \(C\) (Carbon), it is in group \(4A\) of the periodic table. The number of valence electrons for main - group elements is equal to the group number. So, \(C\) has \(4\) valence electrons.
• For element \(S\) (Sulfur), it is in group \(6A\). So, \(S\) has \(6\) valence electrons.
• For element \(K\) (Potassium), it is in group \(1A\). So, \(K\) has \(1\) valence electron.
• For element \(I\) (Iodine), it is in group \(7A\). So, \(I\) has \(7\) valence electrons.
• For element \(B\) (Boron), it is in group \(3A\). So, \(B\) has \(3\) valence electrons.

Answer:

(a) \(4\)
(b) \(6\)
(c) \(1\)
(d) \(7\)
(e) \(3\)