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प्रश्न
What is atomic number?
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उत्तर
The number of electrons or protons in an atom is called the atomic number of that atom. It is represented by the letter Z.
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संबंधित प्रश्न
Dalton said that ______ could not be divided.
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
Draw the orbital diagram of `""_20^40"Ca"^(2+)` ion and state the number of three fundamental particles present in it.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
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The particles that make up the atom are called ______ particles.
Explain the following terms.
- Proton
- Electron
- Neutron.
______ = No. of protons = No. of the electrons.
‘A’ is denoted by ______.
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