atomic structure molecules and nuclear chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 26

When an atom loses electrons, it is called a (an) _____ and has a ______ charge.

a) cation, positive

b) anion, negative

c) anion, positive

d) cation, positive

Question : 27 [NDA]

Which is the symbol of the element tungsten?

a) W

b) Tc

c) Ta

d) V

Question : 28

1 u or 1 amu means

a) Mass of O-16 atom

b) Mass of C-12 atom

c) 1/12th mass of C-12 atoms

d) Mass of Hydrogen molecule

Question : 29 [RAS/RTS (Pre) 1999]

The isoneutronic group, in the following is

a) $^{6}C_{12}, ^{7}N_{14}, ^8N_{18}$

b) $^6C_{14}, ^7N_{14}, ^8O_{16}$

c) $^6C_{12}, ^7N_{14}, ^8O_{16}$

d) $^6C_{14}, ^7N_{15}, ^8O_{16}$

Question : 30

The atomic number of an element is 11 and its mass number is 23. The correct order representing the number of electrons, protons and neutrons respectively in this atom is

a) 11, 12, 11

b) 12, 11, 11

c) 11, 11, 12

d) 23, 11, 23.