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FAQs on Structure of Atom in One Shot
| 1. What are the main components of an atom? |  |
Ans. An atom consists of three primary components: protons, neutrons, and electrons. Protons and neutrons are located in the nucleus at the centre of the atom, while electrons orbit the nucleus in electron shells. Protons carry a positive charge, neutrons are neutral, and electrons have a negative charge.
| 2. How does the atomic number relate to an element? | |
Ans. The atomic number of an element is defined as the number of protons present in the nucleus of an atom of that element. It uniquely identifies the element and determines its position in the periodic table. For example, an element with an atomic number of 6 is carbon, which has 6 protons in its nucleus.
| 3. What is the significance of isotopes in chemistry? | |
Ans. Isotopes are variants of the same chemical element that have the same number of protons but different numbers of neutrons. This results in different atomic masses. Isotopes are significant in various applications, including dating archaeological finds, medical diagnostics, and treatment, as well as in nuclear energy.
| 4. Explain the concept of electron shells and their arrangement. | |
Ans. Electron shells are the regions around the nucleus of an atom where electrons are likely to be found. They are arranged in increasing energy levels, with each shell capable of holding a specific maximum number of electrons, determined by the formula 2n², where n is the shell level. The first shell (n=1) can hold 2 electrons, the second shell (n=2) can hold up to 8, and so forth.
| 5. What is the role of valence electrons in chemical bonding? | |
Ans. Valence electrons are the electrons present in the outermost shell of an atom. They play a crucial role in chemical bonding, as they are involved in forming bonds with other atoms. Atoms tend to bond in such a way that they achieve a full outer shell, which typically corresponds to a stable electronic configuration, often resembling that of noble gases.
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Apr 15, 2026 Last updated
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