hat does the below diagram tell you about the atom?

Question

calcium has 2 protons

calcium has a total of 2 electrons

calcium is stable and will not tend to form a bond

calcium has 2 valence electrons

Answer 1

The diagram suggests that calcium has 20 protons and 18 neutrons in its nucleus. It also shows that calcium has 2 electrons in the first energy level and 8 electrons in the second energy level. This indicates that calcium has a total of 2 electrons in its outermost energy level, making it have 2 valence electrons. This information can help us understand how calcium might interact with other atoms in chemical reactions.