Question

Write electronic configuration and valency of following elements .

i. Na - 11​

Answer 1

Answer:

The atomic number of sodium is 11 (Z=11). ... Atomic number of aluminium is 13 so its electronic configuration is 2, 8, 3. Since it has 3 electrons in its valence shell, it will lose 3 electrons to complete its octet hence its valency is +3.

Answer 2

ANSWER :-

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Electronic configuration of the following elements is:

Electronic configuration of the following elements is:11

Electronic configuration of the following elements is:11

Electronic configuration of the following elements is:11 Na=2,8,1

Electronic configuration of the following elements is:11 Na=2,8,115

Electronic configuration of the following elements is:11 Na=2,8,115

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,5

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,7

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,4

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,412

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,412

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,412 Mg=2,8,2

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,412 Mg=2,8,211

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,412 Mg=2,8,211

Electronic configuration of the following elements is:11 Na=2,8,115 P=2,8,517 Cl=2,8,714 Si=2,8,412 Mg=2,8,211 Na has the largest size among these because according to the trend, the atomic radius decreases as we move from left to right in a period of the periodic table. The atomic number of elements increases which means the number of protons and electrons in the atom increases. Due to a large positive charge on the nucleus, the electrons are pulled closer to the nucleus, and the size of the atom decreases.

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