What is the atomic number of chromium?

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SSC MTS Previous Year Paper (Held on: 8 July 2022 Shift 2)
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  1. 24
  2. 18
  3. 21
  4. 19

Answer (Detailed Solution Below)

Option 1 : 24
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Detailed Solution

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The correct answer is 24.

Key Points

  • Atomic number
    • It is the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing the number of protons in the nucleus.
    • Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.
    • The atomic number (Z) of an element is the number of protons in the nucleus of each atom of that element. Hence, Option 2 is correct.
    • This means that the number of protons is the characteristic that makes each element unique compared to all other elements.
    • Elements are different because of their atomic number.
    • The periodic table displays all of the known elements and is arranged in order of increasing atomic number.
    • In this table, an element’s atomic number is indicated above the elemental symbol.

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