Grade 9 Exam > Grade 9 Videos > Chemistry for Grade 9 > Atoms and Molecules - 2
Atoms and Molecules - 2 Video Lecture | Chemistry for Grade 9
FAQs on Atoms and Molecules - 2 Video Lecture - Chemistry for Grade 9
| 1. What is an atom? |  |
Ans. An atom is the smallest unit of matter that retains the chemical properties of an element. It consists of a nucleus, which contains protons and neutrons, surrounded by electrons.
| 2. What is a molecule? | |
Ans. A molecule is a group of atoms held together by chemical bonds. It is the smallest unit of a compound that retains the chemical properties of that compound.
| 3. What is the difference between an atom and a molecule? | |
Ans. The main difference between an atom and a molecule is the number of atoms present. An atom is a single particle, while a molecule consists of two or more atoms bonded together.
| 4. How are atoms and molecules related to each other? | |
Ans. Atoms are the building blocks of molecules. Molecules are formed when atoms chemically bond together. Different combinations of atoms can form various types of molecules.
| 5. Can atoms or molecules be seen with the naked eye? | |
Ans. No, atoms and molecules cannot be seen with the naked eye as they are extremely small. They are magnitudes smaller than the wavelength of visible light. However, they can be observed indirectly through techniques such as electron microscopy or by studying their effects on macroscopic objects.
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