Which element has 2 valence electrons and is in period 4?
1 Answer
Dec 5, 2016
Calcium
Explanation:
See Periodic table. Match row and column. Row for Period and column for valence electron. Means Calcium is an element which lies at Period 4 in Periodic table and having two valence electrons (Period 4 means 4th shell being occupied having 2 electrons in 4th or outermost shell)
