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Pavel [41]
2 years ago
8

Use the periodic table to answer the questions below.

Chemistry
2 answers:
MrRa [10]2 years ago
4 0

Answer:

Second option.

Explanation:

Nitrogen is the first element of group 15, and its number atomic is 7, so, in its neutral state, it has 7 electrons.

By Linus Pauling diagram (see figure), the electronic distribution will be:

1s^{2} 2s^{2} 2p^{3}

The distribution follows the arrows, from the less energetic subshell for the most energetic one. The subshell <em>s</em> has an only magnetic number, so only one orbital to put electrons. Subshell <em>p</em> has 3 magnetic numbers, so 3 orbitals to put electrons.

To put the electrons, we have to follow Hund's Rule: fulfill the orbitals which only one<em> spin</em>, until all orbitals have this <em>spin</em>, so continue, with the other <em>spin</em>, until finishing the electrons on that subshell. <em>Spin</em> is the rotation of the electron, and it can be +1/2 or -1/2.

So, for subshell 2p, how there are only 3 electrons, all three will be put with the same <em>spin</em> (+1/2, up arrow). If there was one more electron, it would be filled in the first orbital with the <em>spin</em> -1/2, down arrow.

Romashka-Z-Leto [24]2 years ago
3 0
B ............ is the answer,
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The tool or instrument which is used to measure an object’s mass is electronic balance

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<h3>What is fundamental quantities?</h3>

Fundamental quantities can be defined as those physical quantities which forms the basic unit of measurement. They are the quantities upon which other quantities and units are derived from.

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