In helium nucleus, there are

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Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

In helium nucleus, there are

Options:

2 protons and 2 electrons

2 neutrons, 2 protons and 2 electrons

2 protons and 2 neutrons

2 positrons and 2 protons

Correct Answer:

2 protons and 2 neutrons

Explanation:

Helium nucleus → ${}_2He^4$

Number of protons = Z = 2

Number of Neutrons = A – Z = 2.