11 grade chemistry others
Helium atoms have an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Helium atoms have an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
1 Answer
Askiitians Tutor Team
Approved Tutor Answer10 Months agoTo determine the number of neutrons in a helium atom, we can use the atomic mass and the number of protons. Helium has an atomic mass of 4 atomic mass units (u) and contains 2 protons in its nucleus.
Calculating Neutrons
The formula to find the number of neutrons is:
- Number of Neutrons = Atomic Mass - Number of Protons
Substituting the values for helium:
- Atomic Mass = 4 u
- Number of Protons = 2
Now, we can calculate:
- Number of Neutrons = 4 - 2 = 2
Final Answer
Therefore, a helium atom has 2 neutrons in its nucleus.
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