Periodic Classification Of Elements - Study Mode

[#176] Dobereiner made the first observation of . . . . . . . . as a catalyst.
Correct Answer

(C) Pt

[#177] What is the relative tendency of an atom to attract electrons towards another element when it is bound to the atom?
Correct Answer

(A) electronegativity

[#178] The atomic numbers of the four elements are as follows: F(9), P(15), Cl(17), Ar (18). Which of the following two elements will be chemically similar?
Correct Answer

(A) F and Cl

[#179] An element of atomic number 16 is present in the periodic table . . . . . . . . period?
Correct Answer

(A) 3 rd

[#180] The atomic number of N is 7, then the atomic number of the third element of the nitrogen group is:
Correct Answer

(D) 33