What is the isotope symbol for an atom that contain 2 protons and 1 neutron?

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Answer 1 · 2018-08-05T03:43:41

# ""_2^3He#

The subscript of 2 represents the two protons the superscript of 3 represents the total mass of 3 2 protons + 1 neutron = 3 amu mass.

Answer 2 · 2018-08-05T04:03:07

The isotope symbol for helium-3 is #""_2^3"He"#.

Helium-3 contains 2 protons and 1 neutron.
Here's the general formula to write isotope symbols

#""_B^A"C"#

A Represents the mass number

B represents the atomic number

C Represents the element symbol