My b if i prolonged the answer but it briefly answers your question.
According to Bohr's model of the atom, electrons are arranged in specific energy levels or orbits around the nucleus. Each energy level has a maximum number of electrons it can hold.
In the case of boron, it has an atomic number of 5, meaning it has 5 protons in its nucleus. In the Bohr model, the first energy level can hold a maximum of 2 electrons, and the second energy level can hold a maximum of 8 electrons.
To explain how boron can have atoms of two different masses, we need to consider its isotopes. Isotopes are atoms of the same element with different numbers of neutrons. Boron has two isotopes: boron-10 and boron-11.
The difference in mass between these isotopes is due to the different number of neutrons in their nuclei. Boron-10 has 5 protons and 5 neutrons, while boron-11 has 5 protons and 6 neutrons.
Now, let's draw diagrams of each atom:
1. Boron-10:
- The nucleus of boron-10 contains 5 protons and 5 neutrons.
- In the first energy level, there are 2 electrons.
- In the second energy level, there are 3 electrons.
- The diagram would show 5 protons in the nucleus, with two electrons in the first energy level and three electrons in the second energy level.
2. Boron-11:
- The nucleus of boron-11 contains 5 protons and 6 neutrons.
- In the first energy level, there are 2 electrons.
- In the second energy level, there are 3 electrons.
- The diagram would show 5 protons in the nucleus, with two electrons in the first energy level and three electrons in the second energy level.
These diagrams visually represent the arrangement of electrons in the energy levels around the nucleus for boron-10 and boron-11. The difference in mass between the two isotopes is due to the variation in the number of neutrons in their nuclei.