Write symbols of three of the major ions in seawater in the form $$

A

Z$$XQ$,$ where Q is the charge on the ion.$$

Enter your answers in Parts $1-3.$ Examples are $$

$88$

$38$Sr$2+$ and $$

$127$

$53$I$.$

The ions have the following numbers of protons, neutrons, and electrons:

Protons Neutrons Electrons

$($a$)192018$

$($b$)121210$

$($c$)171818$

$1$st attempt

Part $1(1$ point$)$See Periodic Table

Enter the symbol for $($a$)$:

$$

Part $2(1$ point$)$

Enter the symbol for $($b$)$:

$$

Part $3(1$ point$)$See Hint

Enter the symbol for $($c$)$:

$$