Question

find out atomic number and number of valence electron of an atom has 14 neutrons and atomic mass 27 u​

Answer 1

Answer:

the atomic number is 13

Explanation:

the atomic no. = no. of protons= no. of electrons

atomic mass = protons + neutrons

therefore subtract 14(neutrons) from the atomic mass (27) to get the number of protons (also the atomic number) which is 13.

the element is aluminium.

the electron arrangement is 2.8.3

the valency is 3.

Answer 2

Explanation:

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