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Important Topics for NEET: Some Basic Concepts of Chemistry Video Lecture | Chemistry Class 11
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FAQs on Important Topics for NEET: Some Basic Concepts of Chemistry Video Lecture - Chemistry Class 11
| 1. What are the basic concepts of chemistry? |  |
Ans. The basic concepts of chemistry include elements, compounds, mixtures, chemical reactions, and atomic structure. Elements are the building blocks of matter, compounds are substances formed by the combination of two or more elements, mixtures are combinations of substances that can be physically separated, chemical reactions involve the rearrangement of atoms to form new substances, and atomic structure refers to the arrangement and behavior of atoms.
| 2. How are elements different from compounds? | |
Ans. Elements are substances that cannot be broken down into simpler substances by chemical means. They are made up of only one type of atom. On the other hand, compounds are substances formed by the combination of two or more elements in fixed proportions. Compounds have different properties from the elements that make them up and can be broken down into their constituent elements through chemical reactions.
| 3. What are some examples of mixtures? | |
Ans. Some examples of mixtures include air (a mixture of gases), saltwater (a mixture of salt and water), sand and gravel (a mixture of solid particles), and milk (a mixture of water, fats, proteins, and other components). Mixtures can be homogeneous (uniform composition) or heterogeneous (non-uniform composition).
| 4. How do chemical reactions occur? | |
Ans. Chemical reactions occur when bonds between atoms are broken and new bonds are formed, resulting in the formation of different substances. During a chemical reaction, atoms are rearranged, and the total number of atoms remains constant. This is known as the law of conservation of mass. Chemical reactions can be represented by balanced chemical equations, which show the reactants and products involved.
| 5. What is the atomic structure? | |
Ans. Atomic structure refers to the arrangement and behavior of atoms. Atoms consist of a central nucleus containing protons and neutrons, surrounded by electrons in energy levels or shells. The nucleus has a positive charge due to the protons, while the electrons have a negative charge. The number of protons determines the atomic number, which defines the element. The arrangement of electrons in energy levels determines the chemical properties of an element.
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Nov 21, 2024 Last updated |
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