tiffanydowell13
19.08.2019 •
Chemistry
Which atom in the ground state has a partially filled second electron shell?
hydrogen atom
lithium atom
potassium atom
sodium atom
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Ответ:
This is because it has an electron configuration of 1s2, 2s1 (also written as [He]2s1)
Ответ:
If it takes more energy to break the original bonds than is released when the new bonds are formed, then the net energy of the reaction is negative. This means that energy must be pumped into the system to keep the reaction going. Such reactions are known as endothermic.
Explanation: