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3 years ago

Which of the following groups contain three elements with stable electron configurations?

Chemistry

2 answers:

Roman55 [17]3 years ago

6 0

Answer:

The correct option is: d. helium, xenon, neon

Explanation:

In the periodic table, the chemical elements belonging to the group 18 are called the inert gases or noble gases.

The noble gases have stable electronic configuration, as they have completely filled valence electron shells. Thus the noble gases have very low reactivity.

The noble gases are helium, neon, argon, krypton, xenon, and radon.

Therefore, the group having elements with stable electron configurations is d. helium, xenon, neon.

hichkok12 [17]3 years ago

4 0

(D)Helium, Xenon, Neon

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Consider the following reaction at equilibrium: 2 NH3(g) ⇄ N2(g) + 3 H2(g) What does Le Chatelier's principle predict will happe

BabaBlast [244]

Answer : The equilibrium will shift in the left direction.

Explanation :

Le-Chatelier's principle : This principle states that if any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

The given reaction is:

$2NH_3(g)\rightleftharpoons N_2(g)+3H_2(g)$

As per question, when we are adding $N_2$ then the concentration of $N_2$ is increased on product side then the equilibrium will shift in the direction where decrease of concentration of $N_2$ takes place. Therefore, the equilibrium will shift in the left direction.

Thus, the equilibrium will shift in the left direction.

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4 years ago

When Acid is added to the buffer, base within the buffer reacts with added

LuckyWell [14K]

F A L S E yeyeyeyeyye

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3 years ago

how much heat will be absorbed by 25g of chloroform when its temperature started at 67.0C and after it was 112.0C

snow_tiger [21]

Hello friend ☺

ΔH = MCΔT

ΔH = to the amount of energy or change in energy (J)

mass of water

C = waters specific heat capacity

ΔT = change in temperature

and so ΔH = 25 × 4.18 × ( 112-67 ) J = 4702.5 J

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8 0

3 years ago

The following diagram shows various positions of the moon in its orbit around Earth. The image of the moon shows its phase as se

Serga [27]

Answer:

Position D

Explanation:

One fourth of the Moon will be visible from Earth when the Moon is in position D. The reason why this is the right position is that the Moon will be in a position where the majority of its surface that is lighted by the Sun is facing the Sun. On the other hand, the angle is just right that about one quarter of the lighted part of the Moon is also facing the Earth. This will result in a perception from the Earth's view point that the Moon is lighted at one quarter of its surface.

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4 years ago

What is the chemical name of this compound? Na2S:

ahrayia [7]

Answer:

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