hat does the below diagram tell you about the atom?
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
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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.
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