Question

46. In an atom with atomic number 29. mass number 59.
the number of electrons is
(a) 29 (b) 30 (c) 40 (d) 59​

Answer 1

Answer:29

Explanation:

Atomic number = number of electrons = number of protons

Remember this is only applicable if it is electrically neutral.

Answer 2

Answer:

The number of electrons will be (a)29

Explanation:

• Atomic number: It is the number of a element in the periodic system, whereby they are arranged in order of increasing number of protons. It is also the count of protons that a chemical element has in its centre.

• Mass number: It is the sum of total number of protons and nuetrons present in the nucleus of any element.

Since,

atomic number= no. of protons

So, no of protons is 29.

also, atomic number 29 is copper which is electrically neutral.

Therefore, protons count will be equal to electron count.

Hence, the number of electrons will be (a)29

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