Question

Complete the following table: $(4.4,4.5)$

Short answer

Name	Atomic Symbol	Number of Protons	Number of Neutrons	Number of Electrons
Selenium	$\begin{array}{c}34\\ 16\end{array}Se$	16	18	16
Nikal	$\begin{array}{c}62\\ 28\end{array}Ni$	28	34	28
Magnesium	$\begin{array}{c}26\\ 12\end{array}Mg$	12	14	12
Radium	$\begin{array}{c}288\\ 28\end{array}Ra$	88	140	88

Step-by-step solution

Given Information

We need to complete the table.

Simplify

Selenium-$\begin{array}{c}34\\ 16\end{array}Se$

number of protons- $16$

number of neutrons- localid="1652015569429" $34-16=18$

number of electrons-$16$

Nikal- localid="1652016060903" $\begin{array}{c}62\\ 28\end{array}Ni$

number of protons- localid="1652016063894" $28$

number of neutrons- localid="1652016067073" $34$

number of electrons- localid="1652016070565" $28$

Magnesium localid="1652016073400" $\begin{array}{c}26\\ 12\end{array}Mg$

number of protons- $12$

number of neutrons- localid="1652016077675" $14$

number of electrons- localid="1652016081839" $12$

Radium localid="1652016086033" $\begin{array}{c}288\\ 28\end{array}Ra$

number of protons- localid="1652016090956" $88$

number of neutrons- localid="1652016094789" $228-88=140$

number of electrons- localid="1652016098730" $88$