Question

Which of the following are true for an element? i) Atomic number = number of protons + number of electrons (ii) Mass number = number of protons + number of neutrons (iii) Atomic mass = number of protons = number of neutrons (iv) Atomic number = number of protons = number of electrons *
1 point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)
10) Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order(i) Rutherford’s atomic model(ii) Thomson’s atomic model(iii) Bohr’s atomic model *
1 point
(a) (i), (ii) and (iii)
(b) (ii), (iii) and (i)
(c) (ii), (i) and (iii)
(d) (iii), (ii) and (i)
11) An atom with 3 protons and 4 neutrons will have a valency of *
1 point
(a) 3
(b) 7
(c) 1
(d) 4​

Answer 1

Answer:

1. b) ii and III
2. c ) ii I and III
3. a )3