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belka [17]
3 years ago
5

How many valence electrons does hydrogen need to have a full first shell?

Chemistry
1 answer:
Ket [755]3 years ago
5 0
Well, the element of hydrogen only has 1 electron in its s sub shell, if it's s sub shell for the energy level of 1 were to be filled, there would need to be 2 electrons present in its shell to have a full first shell, as the s sub shell can only hold 2 electrons within it.
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Outline in which direction the equilibrium 2 points
Dennis_Churaev [7]

Explanation:

  Reaction equation:

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All the species are in gaseous state and the equation is balanced.

 Change in pressure only affects equilibrium involving a gas or gases.

Based on Le Chatelier's principle, an increase in pressure will shift the position of equilibrium to the side having smaller volume or number of moles and vice versa.

          CO + 2H₂  →  CH₃OH

 3moles of gases     1 mole of gas

  An increase in pressure favors the forward reaction. A decrease in pressure will favor the backward step.

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B. mass, volume

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3 years ago
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<u>Answer:</u> The chemical equation is HCl(g)+NH_3(g)\rightarrow NH_4Cl(s)+42.1kCal

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Exothermic reactions: They are defined as the reactions where heat is released by the reaction. The change in enthalpy of the reaction is always negative.

Given values:

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The chemical equation for the formation of ammonium chloride follows:

HCl(g)+NH_3(g)\rightarrow NH_4Cl(s)+42.1kCal

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