Question

20. Base your answer(s) to the following question(s)

on the information below and on your knowledge
of chemistry.
The Bohr model of the atom was
developed in the early part of the twentieth
century. A diagram of the Bohr model for
one atom, in the ground state, of a specific
element is shown below. The nucleus of this
atom contains 4 protons and 5 neutrons.
Bohr Model
Nucleus
Second shell-
First shell
State the number of electrons in each shell in this
atom in the ground state.

Answer 1

In the ground state, the atom has 2 electrons in the first shell and 4 electrons in the second shell, according to the Bohr model.

In the Bohr model of the atom, electrons are arranged in shells around the nucleus, each shell representing a specific energy level. The number of electrons in each shell is determined by the rules governing electron distribution.

In the given Bohr model for an atom with a nucleus containing 4 protons and 5 neutrons, we are dealing with the ground state. The ground state is the lowest energy state of an atom, and electrons occupy the available shells in a specific order.

The first shell can accommodate a maximum of 2 electrons, and the second shell can hold up to 8 electrons. In the ground state, electrons fill the innermost shell first before moving to the outer shells.

In this specific atom:

The first shell contains 2 electrons (since it can only hold a maximum of 2).

The second shell contains the remaining electrons, which is 4 (8 - 2).

Therefore, the distribution of electrons in the ground state of this atom is 2 in the first shell and 4 in the second shell.