Modern Physics 7 Question 52
58. How many electrons, protons and neutrons are there in a nucleus of atomic number 11 and mass number 24 ? Find,
(1982, 2M)
(a) Number of electrons.
(b) Number of protons.
(c) Number of neutrons.
Show Answer
Answer:
Correct Answer: 58. Zero, 11,13
Solution:
- Number of proton $=$ atomic number $=11$
Number of neutron $=$ mass number - atomic number $=13$
But note that in the nucleus number of electrons will be zero.
Download Chapter Test
Solved Paper 2019
Paper 1
Section 1 (Maximum Marks : 12)
- This section contains FOUR (04) questions
- Each question has FOUR options. ONLY ONE of these four options is the correct answer.
- For each question, choose the option corresponding to the correct answer.
- Answer to each question will be evaluated according to the following marking scheme:
- Full Marks
-
3 If ONLY the correct options is chosen.
Zero Marks
Negative Marks
0 If none of the options is chosen. (i.e., the question is unanswered)
-1 In all other cases.
