Table 2-14 -Table 2-14 Indicates the Number and Arrangement of Electrons in Electrons

Multiple Choice

Table 2-14
-Table 2-14 indicates the number and arrangement of electrons in the first four atomic electron shells for selected elements.On the basis of the information in the chart and what you know about atomic structure, which elements form stable but reactive diatomic gases?

A) nitrogen; oxygen
B) helium; neon
C) sodium; potassium
D) magnesium; calcium