Chemistry
Grade-9
Easy

Question

How many electrons does a copper atom have?

  1. 63
  2. 29
  3. 92
  4. 34

hintHint:

Generally in an elements are neutral with equal number of proton and electron.

The correct answer is: 29


    • Elements are represented in the form AXZ, A is atomic mass and Z is atomic number.
    • Atomic mass = number of proton + number of neutron. Atomic number = number of protons.
    • Generally in an elements are neutral with equal number of proton and electron.
    • Number of electrons in copper atom is 29.

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