an atomic number of 6 an atomic mass of 12 the same electron configuration the number of valence electrons
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of following is a property shared by the elements in the carbon family?
Possibilities:
- an atomic number of 6
- an atomic mass of 12
- the same electron configuration
- the number of valence electrons

the number of valence electrons