Atomic structure

Lithium is an element in Group 1 of the Periodic Table.

An atom of lithium can be represented as $37Li\phantom{}_{3}^{7}\text{Li}$ .

Use numbers from the box to complete the sentences about this atom of lithium.

\begin{array}{|ccccc|} \hline 1 & 3 & 4 & 7 & 10 \\ \hline \end{array}

Each number may be used once, more than once or not at all.

(i) The atomic number of lithium is $__________\text{\_\_\_\_\_\_\_\_\_\_}$ .
(ii) The mass number of lithium is $__________\text{\_\_\_\_\_\_\_\_\_\_}$ .
(iii) This atom of lithium contains $__________\text{\_\_\_\_\_\_\_\_\_\_}$ protons.
(iv) This atom of lithium contains $__________\text{\_\_\_\_\_\_\_\_\_\_}$ neutrons.
(v) This atom of lithium contains $__________\text{\_\_\_\_\_\_\_\_\_\_}$ electrons.

[5]

Sodium is another element in Group 1 of the Periodic Table.

Select a word or phrase from the box to complete each sentence about an atom of sodium.

\begin{array}{|ccc|} \hline \text{fewer} & \text{more} & \text{the same number of} \\ \hline \end{array}

Each word or phrase may be used once, more than once or not at all.

(i) Compared to an atom of lithium, an atom of sodium has $__________\text{\_\_\_\_\_\_\_\_\_\_}$ protons.
(ii) Compared to an atom of lithium, an atom of sodium has $__________\text{\_\_\_\_\_\_\_\_\_\_}$ neutrons.
(iii) Compared to an atom of lithium, an atom of sodium has $__________\text{\_\_\_\_\_\_\_\_\_\_}$ electrons in its outer shell.

[3]

The electronic configuration of sodium is:

[1]