Atoms And Nuclei Question 172
Question: In helium nucleus, there are [RPET 1997]
Options:
A) 2 protons and 2 electrons
B) 2 neutrons, 2 protons and 2 electrons
C) 2 protons and 2 neutrons
D) 2 positrons and 2 protons
Show Answer
Answer:
Correct Answer: C
Solution:
Helium nucleus R $ _{2}He^{4} $ . Number of protons = Z = 2 Number of Neutrons = A - Z = 2.