If an Element Has 9 Protons and 10 Neutrons and 9

Multiple Choice

If an element has 9 protons and 10 neutrons and 9 electrons,which expression correctly identifies the element?

A) $\begin{array} { c } 19 \\9\end{array}$ F
B) $\begin{array} { c } 9 \\19\end{array}$ F
C) $\begin{array} { c } 19 \\9\end{array}$ K
D) $\begin{array} { c } 9 \\19\end{array}$ K
E) $\begin{array} { c } 19 \\19\end{array}$