Question

atomic number for the helium isotope with 1 neutrons
express your answer as an integer.

atomic number =

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part f

mass number for the helium isotope with 1 neutrons
express your answer as an integer.

mass number =

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Explanation:

Step1: Define atomic number of helium

The atomic number of an element equals its number of protons, and helium always has 2 protons, so its atomic number is fixed at 2, regardless of neutron count.

Step2: Calculate mass number

Mass number = number of protons + number of neutrons. Helium has 2 protons, and this isotope has 1 neutron.
$\text{Mass number} = 2 + 1 = 3$

Answer:

Atomic number = 2
Mass number = 3