In an atom that has an electron configuration of 1s^2 2s^2 2p^3. The total number of electrons in its sublevel of highest energy is 3.
Electronic configuration represents the number of electrons in the excited state or in the subshells of an element.
1s^2 2s^2 2p^3 is the electronic configuration of nitrogen i.e. N7.
The atomic number of nitrogen is 7 and the atomic mass is 3. Hence, the electrons are in the 's' and 'p' subshells of the main shell.
This electronic configuration shows that nitrogen is in an exciting oxidation state and has 3 electrons in its highest energy level.
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Sliding friction is harder to overcome, and steals
more energy whenever you're moving.
That's why we switched from sleds to wheels
several thousand years ago.
Explanation:
For 787 dreamliner airplane,
Mass, 
Height, 
Potential energy of 787 dreamliner airplane is given by :

For a boeing 747,
Mass, 
Height, 
:
Potential energy of a boeing 747 airplane is given by

So, the potential energy of a boeing 747 airplane is more than the 787 dreamliner airplane.
The conversion factor you use is 100 cm = 1 m.
You can divide 20 by 100 to get the answer.
20 cm/100 cm =.2 m
Hope this helped!
I need a picture to help you