R.R. Mishra Solutions for Exercise 2: SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)

An element X of group $15$ and period $2$ exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. Draw the electron dot structure of the diatomic molecule of $\mathrm{X}$ and name the type of bond formed.

An element $\mathrm{X}$ of group $15$ and period $2$ exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. Draw the electron dot structure of ammonia.

Write the electronic configuration of each one of $\mathrm{Li}\left(3\right)$, $\mathrm{Na}\left(11\right)$, and $\mathrm{K}\left(19\right)$ answer the following question: Formula of sodium sulphate is ${\mathrm{Na}}_2{\mathrm{SO}}_4$. Write the formula of potassium sulphate.

Consider the elements $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Al}$ and their respective atomic numbers 11, 12, and 13. Write the electronic configuration of each element and answer the following questions: What is the number of valence electrons in each element?

Consider the elements $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Al}$ and their respective atomic numbers 11, 12, and 13. Write the electronic configuration of each element and answer the following questions: Assign the period to each element in the periodic table.

Consider the elements $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Al}$ and their respective atomic numbers 11, 12, and 13. Write the electronic configuration of each element and answer the following questions: Which element is most reactive?

Consider the elements $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Al}$ and their respective atomic numbers 11, 12, and 13. Write the electronic configuration of each element and answer the following questions: Which element is least reactive?

Consider the elements $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Al}$ and their respective atomic numbers 11, 12, and 13. Write the electronic configuration of each element and answer the following questions: Which element has the largest atomic radius?