Chemistry - Study Mode

[#831] Periodic table contains how many periods
Correct Answer

(B) 7

Explanation

Solution: Periodic table contains 7 periods.

[#832] Which one is the lightest element in the periodic table
Correct Answer

(A) Hydrogen

Explanation

Solution: The lightest chemical element is Hydrogen and the heaviest is Hassium.

[#833] Which one of the following is most electronegative?
Correct Answer

(A) Carbon

Explanation

Solution: Carbon is most electronegative among the following.

[#834] Periodic table contains how many groups
Correct Answer

(C) 18

Explanation

Solution: The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups. The elements in each group have the same number of valence electrons.

[#835] Total number of elements in the Periodic table
Correct Answer

(C) 118

Explanation

Solution: Total number of elements in the periodic table is 118.