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3 years ago

How many electrons does nitrogen (N) need to gain to have a stable outer electron shell

2 answers:

7 0

It need "3 electrons" to have a stable electronic configuration.

'cause it has 5 electrons in it's outer shell & every atom needs 8 electrons. So, it requires 3 more!

Hope this helps!

dem82 [27]3 years ago

4 0

Answer: 3 more electrons

Explanation: Generally elements with inert gas configuration are more stable. It is also called as Octet rule.

It tells that, elements which have electrons equal to atomic number of inert gases (2,8,10,18,36 etc) in their valency shell are exceptionally stable.

Here in our case, nitrogen has atomic number-7, 1s2 2s2 2p3

Here N has 5 electrons in valency shell , hence it needs 3 more electrons to get octet configuration.

So answer is 3 Electrons

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What is relative isotopic mass

lidiya [134]

Answer:

Relative atomic mass or atomic weight is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant. The atomic mass constant is defined as being 1/12 of the mass of a carbon-12 atom.

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3 years ago

How could you verify that you produced carbon dioxide in your combustion reaction? 2. what indication did you have that nh3 was

DanielleElmas [232]

1) Carbon dioxide is a gas, so when $CO_{2}$ is evolved in the reaction, it appears as bubbles. The gas released extinguishes the fire and it can turn lime water milky.

$Ca(OH)_{2} (aq) + CO_{2}(g) ----> CaCO_{3}(s) +H_{2}O(l)$

2) When $NH_{3}$ is released in a decomposition reaction we can identify by the strong pungent smell of the gas released.

3) Saturated citric acid can cause corrosion of the metal layers present in the pipes. So, before draining out any acid it is neutralized so that the pipes and other plumbing works do not get damaged leading to leaks in the drainage system.

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4 years ago

When heat is applied gradually and evenly to solid ice at 0 Celsius, it melts. Does the temperature change while it is melting t

serious [3.7K]

No, the added heat melts the ice, but the result is water at the same temperature. Hence, option B is correct.

<h3>What is temperature?</h3>

The degree of hotness or coldness is measured on a definite scale.

Temperature doesn't change as heat is added during a phase change; for example, when the ice melts.

During the phase change, the added heat doesn't make the molecules move faster, but rather further apart.

Thus, No, the added heat melts the ice, but the result is water at the same temperature.

Learn more about the temperature here:

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2 years ago

Which of the following are physical characteristics of blood? 1. it is more viscous than water 2. its temperature is about 38ºC

yawa3891 [41]

Explanation:

A property which does not bring any change in chemical composition of a substance is known as physical property.

For example, blood is more viscous than water, its pH is slightly alkaline, its temperature is about $38^{o}C$ ( $100.4^{o}F$ ) .

On the other hand, a property which changes chemical composition of a substance is known as a chemical property.

For example, precipitation, reactivity, toxicity etc are chemical property.

Sometimes, the change in color of a substance can also occur due to a chemical change.

Thus, we can conclude that following are the physical characteristics of blood.

it is more viscous than water.

its temperature is about $38^{o}C$ ( $100.4^{o}F$ ).

the pH is slightly alkaline.

it is about 8% of one’s total body weight.

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3 years ago

Metals are really good thermal conductors for which of the following reasons? Select all that apply. Metals are really good ther

Natasha_Volkova [10]

B. Particles of metallic structure begin to vibrate faster as they absorb.

C. Metals have a larger number of freely moving electrons.

D. Metals have high densities.

7 0

3 years ago

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