Question

Which of these pairs of elements have the same number of valence electrons?

hydrogen (H) and helium (He)
sodium (Na) and potassium (K)
carbon (C) and oxygen (O)
boron (B) and beryllium (Be)

Answer 1

The correct answer is the second option; sodium (Na) and potassium (K.)

Both sodium and potassium have the same number of valence electrons.

Step-by-step explanation:

Answer 2

The correct answer is the second option; sodium (Na) and potassium (K.)
Both sodium and potassium have the same number of valence electrons.