NEET Classification of Elements and Periodicity in Properties — Set 1

Question 1

Which element has the highest density among the alkali metals?

Accepted Answer

Density generally increases down group 1 due to increasing atomic mass, with Cs having the highest density among Li, Na, K, and Cs.

Question 2

Which group 16 element forms the most stable dioxide at room temperature?

Accepted Answer

Group 16 dioxides vary in stability. $\ce{SO2}$ (bent, gaseous) is the most stable at room temperature due to strong S=O bonds, unlike $\ce{O2}$ (diatomic gas), $\ce{SeO2}$ (polymeric solid), or $\ce{TeO2}$ (solid).

Question 3

Which element in group 14 has the highest electronegativity?

Accepted Answer

Electronegativity decreases down a group. Among C, Si, Ge, and Pb (group 14), C (period 2) has the highest value.

NEET Chemistry: Classification of Elements and Periodicity in Properties — Practice Set 1

Q1. Which element has the highest density among the alkali metals?

Q2. Which group 16 element forms the most stable dioxide at room temperature?

Q3. Which element in group 14 has the highest electronegativity?

Q4. Which group 17 element forms a hydride with the highest dipole moment?

Q5. What is the general outer electronic configuration of f-block elements?

Q6. What is the temporary systematic name of the element with atomic number 118?

Q7. Which element has the ground state electronic configuration \(1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4p^1\)?

Q8. What is the formula of the compound formed by carbon and chlorine?

Q9. Which of the following chlorides has the highest covalent character?

Q10. Which oxide of a group 13 element is amphoteric and used in the extraction of aluminium?