How many of the following the second element has higher density than the first one ?
1) Ag, Au 2) Hf, Zn 3) Zn, Hg 4) Na, Hf 5) Ca, W 6) Ta, Nb

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

3,4, 5, and 6

All of them

1,2, and 3

1,3,4,5

answer is C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Third series of transition elements has a great density than second row of transition series, group IA and group IIA elements because the atomic size is not changing that much but atomic number is increasing, thereby having a high density.

Au has a high density than Ag because Au is in third transition series and Ag in the second transition series.
Hg is in the third transition element series whereas Zn is in the first transition element series.
Hf and W are transition metals whereas Na and Ca are group IA and group IIA elements respectively.

Watch 3-min video & get full concept clarity