) An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom?
A. 1
B. 3
C. 6
D. 8
Answer:A
) An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom?
A. 1 B. 3 C. 6 D. 8