which of the following is the correct bohr model for the isotope?\n$_{2}^{4}he$
which of the following is the correct bohr model for the isotope?\n$_{2}^{4}he$
Answer
Explanation:
Step1: Understand Bohr - model basics
In the Bohr model of an atom, the atomic number ($Z$) gives the number of protons and the number of electrons in a neutral atom, and the mass number ($A$) gives the sum of protons and neutrons. For $_{2}^{4}\text{He}$, $Z = 2$ (number of protons) and $A=4$. The number of neutrons $n=A - Z=4 - 2 = 2$. The first shell (K - shell) can hold a maximum of 2 electrons.
Step2: Analyze the electron - shell distribution
A neutral helium atom has 2 electrons. In the Bohr model, these 2 electrons will occupy the innermost shell (K - shell).
Answer:
The second model (the one with 2 protons, 2 neutrons in the nucleus and 2 electrons in the single shell) is the correct Bohr model for $_{2}^{4}\text{He}$.