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4 years ago

Which of the following is not a possible sublevel? 1p 2s 3d 4f

Chemistry

2 answers:

scoundrel [369]4 years ago

5 0

Answer is: 1p.

First energy level only have one sublevel 1s.

Second energy level has 2s and 2p, third has 3s, 3p and 3d and fourth has 4s, 4p, 4s and 4f.

Aufbau principle is a scheme used to reproduce the electron configurations of the ground states of atoms by successively filling subshells (orbitals) with electrons in a specific order.

Filling subshells in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f.

Sindrei [870]4 years ago

3 0

1p is not possible because it goes like this 1s2 2s2 2p6

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Ionization energies tend to do what across a period

neonofarm [45]

Trend-wise, ionization energy tends to increase while one progresses across a periodbecause the greater number of protons (higher nuclear charge) attract the orbiting electrons more strongly, thereby increasing the energy required to remove one of the electrons.

6 0

3 years ago

Identify all of the following three changes that would shift the equilibrium of the Haber [HAH-bur] process to the right: a) Add

Vladimir [108]

Answer:

a).Adding hydrogen gas : Forward direction

b) Adding an inert gas

At constant pressure : Backward direction
At constant Volume : No change

c) Increasing the volume of the container:Backward direction

Explanation:

According to Le-Chatelier's principle = Any disturbance is created in the equilibrium , it will shift the equilibrium in such a way to reduce disturbance.

This disturbance can be : Change in concentration , pressure, temperature , Addition of gas etc.

Temperature : when temperature is increased for endothermic reaction . The equilibrium shift in forward. For exothermic reaction , on increasing temperature ,equilibrium shift backward.

Pressure : On increasing pressure the equilibrium shifts towards less number of gaseous molecules.

Volume : Since volume varies inversely with pressure . It's effect is opposite to that produced by pressure change i.e On increasing Volume the equilibrium shifts towards more number of gaseous molecules.

On Addition of Inert gas : The equilibrium shift toward the side where more gaseous molecules are present.

Concentration : On increasing concentration , the equilibrium will shift such that the substance added get removed .

Haber Process :

$N_{2}(g)+3H_{2}(g)\rightarrow 2NH_{3}(g)$

This is exothermic reaction (H = negative)

Molecules of gases are more on left side(reactants) than right side(product)

a) Adding hydrogen gas :

According to Le-Chatelier's principle ,The equilibrium will shift in a direction where the Hydrogen gas is consumed (removed)

Hence Equilibrium shift in forward direction

b) Adding an inert gas : There are two situation

If inert gas is added at constant pressure: Total Volume is increased, so equilibrium will shift in direction where there is increase in number of molecule(Le-Chatelier's).Here, equilibrium shift in backward direction
If inert gas is added at constant Volume :No change in equilibrium.This because if inert gas is added pressure will increase but there is no change in moles per unit volume(constant) of gases.

c) Increasing the volume of the container:

If total Volume is increased, the number of molecules per unit volume decrease.In order to maintain the equilibrium constant , the equilibrium shift in direction where there is increase in number of molecule(Le-Chatelier's).

In this case Backward direction.

3 0

3 years ago

consider the following reversable reaction C(s)+O2(g) arrow thing, forgot what its called CO2(g). what is the equilibrium consta

lbvjy [14]

Equilibrium constant expression equals (pressure of co2)/(pressure of O2).you don’t include c in the expression because solids are never included and if pressure is not given and the volume is 1L use the number of moles given rather than the pressure.

6 0

4 years ago

What is the numerical value of gold silver and platinum?

Klio2033 [76]

Platinum:

850 Platinum: 85% platinum
950 Platinum: 95% platinum
900 Platinum: 90% platinum

Gold:

24 karat: 99.9% gold; the purest form.
22 karat: 91.7% gold
18 karat: 75% gold
14 karat: 58.3% gold
10 karat: 41.7% gold

3 0

2 years ago

covalent molecular solids (like sugar) and covalent network solids (like diamond) have similar bonds and bond strengths. However

QveST [7]

Answer:

Covalent molecular solids (like sugar): No intermolecular covalent bonds

Covalent network solids (like diamond) : Intermolecular covalent interactions are present.

Explanation:

Covalent moleuclar solids are the solids which have "intera-molecular" covalent bonds i.e the covalent bonds exist between two atoms within the same molecule. The intermolecular bonds are not covalent. They are some weak intermolecular interactions like hydrogen bonds or disperison forces.

In case of covalent network solids, the intermolecular interactions are also strong covalent bonds. Thus they give a more strength and firmness to the compound or solid.

5 0

3 years ago