Question

Which element among the hydrogen ,lithium and sodium has highest atomic size where these are the first three elements of first group in periodic table

Answer 1

Answer:

hydrogen has the highest atomic size

Answer 2

The atomic size of Sodium is highest than Lithium and Hydrogen.

Explanation:

• In the periodic table, the elements such as Hydrogen, Lithium, and Sodium are located in the 1st group.
• In the group the atomic size of the elements increases as we move from top to bottom as the number of electrons present in the element increases.
• The elements present in group 1 are Hydrogen and alkali metals such as lithium, sodium, potassium, rubidium, cesium, and francium.
• The number of electrons present in hydrogen, lithium and sodium are as follows:

1. Hydrogen - 1
2. Lithium - 3
3. Sodium - 11

• Thus it is inferred that among the given elements the sodium has the highest atomic size.

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