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Fun Video: Structure of Atoms(Atomic and mass number) Video Lecture - Class 9

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Video Timeline
Video Timeline
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02:05 Einstein & Atoms
03:18 Composition of Atoms
04:20 Atomic Number
04:45 Question 1
07:26 Relative Atomic Mass
07:44 Mass Number
08:04 Isotopes
08:42 Question 2
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FAQs on Fun Video: Structure of Atoms(Atomic and mass number) Video Lecture - Class 9

1. What is an atomic number?
Ans. The atomic number of an atom is the number of protons present in its nucleus. It is a unique characteristic of each element and determines its position in the periodic table.
2. What is a mass number?
Ans. The mass number of an atom is the sum of the number of protons and neutrons present in its nucleus. It represents the total mass of the atom.
3. How can the atomic number be determined?
Ans. The atomic number can be determined by counting the number of protons in an atom. This information can be obtained from the periodic table, where the elements are arranged in increasing order of atomic numbers.
4. Is the atomic number the same for all atoms of an element?
Ans. Yes, the atomic number is the same for all atoms of a particular element. It is a unique characteristic that distinguishes one element from another.
5. Can the mass number of an atom vary?
Ans. Yes, the mass number of an atom can vary. Isotopes are atoms of the same element that have different mass numbers due to a different number of neutrons in their nuclei.
Video Timeline
Video Timeline
arrow
02:05 Einstein & Atoms
03:18 Composition of Atoms
04:20 Atomic Number
04:45 Question 1
07:26 Relative Atomic Mass
07:44 Mass Number
08:04 Isotopes
08:42 Question 2
More
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