Q62 of 149 Page 194

The subatomic particle called electron was discovered by:

The subatomic particle called electron was discovered by J.J. Thomson.

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60

Which of the following is the correct electronic configuration of sodium?

 61

The particle not present in an ordinary hydrogen atom is:

 63

Which of the following represents the correct electron distribution in magnesium ion?

 64

The correct electronic configuration of a chloride ion is: