Question

An element `X` have 3 electrons in its outer most third orbit.

a. What will be its Atomic number and Number of proton in it.

b. Write its Electronic configuration.(step by step)

Answer 1

Answer:

Explanation:

aluminium----elementX

ATOMIC NUMBER=13

PROTONS=13

ELECTRONIC CONFIGURATION;

1S2 2S2 2P6 3S2 3P1

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Answer 2

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He number of electrons in its valence shell is 3. There for its a metal and has valency -3. It has 3 shells therefore it's configuration is 2,8,3