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harina [27]
4 years ago
10

Give electronic configuration of the following elements: (20) i) Ca ii) Ar iii) Si

Chemistry
1 answer:
Katen [24]4 years ago
8 0

Answer:

i) Ca = [Ar] 4s2

ii) Ar = [Ne] 3s2 3p6

III) Si = [Ne] 3s2 3p2

Explanation:

The Moeller diagram or Diagonals Rule is used to remember the order of filling of the atomic orbitals. It is simply a mnemonic rule.

The way to construct this diagram is to write the atomic energy levels (from 1 to 7) and the corresponding sub-levels next to it. Then diagonal lines are drawn from top to bottom.

The objective of the electronic configuration is to be clear about the distribution and the energetic order of the atoms, specifically, the distribution of the different levels and sub-levels of energy.

Electronic configuration:

Ca (Z= 20)

Ca: 1s2 2s2 2p6 3s2 3p6 4s2

Ar (Z= 18)

Ar: 1s2 2s2 2p6 3s2 3p6

Si (Z= 14)

Si: 1s2 2s2 2p6 3s2 3p2

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Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

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UO_2(s) + 4 HF(g)\rightleftharpoons UF_4(g) + 2 H_2O(g)

1. Water vapor is removed

On removal of water vapor from equilibrium will decrease the product which will lead to moving forward of an equilibrium that is equilibrium will shift to right direction.

2. UF_4(g) is added

On addition of UF_4(g) from equilibrium will increase the reactant which will lead to moving forward of an equilibrium that is equilibrium will shift to right direction.

3.The reaction is done in a glass reaction vessel. HF(g) attacks and reacts with the glass

Due to reaction of HF with glass will result in decrease in amount of HF present at equilibrium. So, order to counter this equilibrium will shift in backward direction or in left direction.

4. If the reaction is endothermic, and you want to make the equilibrium shift to the right to maximize the products, would you heat or cool the reaction vessel.

I endothermic reaction , heat is added to the reaction for which we can treat heat as a reactant.Now, we want to shift the equilibrium to right which means in the forward direction.

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So, for increasing heat we will heat the reaction vessel.

5 0
3 years ago
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Gekata [30.6K]
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Explanation:

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Answer:

\large \boxed{\text{4 600 000 kg or 4600 Mg}}

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Note: The answer can have only two significant figures because that is all you gave for age of the elephant.

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