reyamukhtar
14.03.2022 •
Chemistry
The electronic configuration of an element is given below.
Element 1: 1s22s22p4
Which statement about the reactivity of the element is true?
It is reactive because it has to gain an electron to have a full outermost energy level.
It is unreactive because it has to lose an electron to have a full outermost energy level.
It is reactive because it has to gain two electrons to have a full outermost energy level.
It is unreactive because it has to gain two electrons to have a full outermost energy level.
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Ответ:
It is reactive because it has to gain an electron to have a full outermost energy level.
Explanation:
The electron configuration of oxygen is 1s2,2s2 2p4.
Oxygen is in group six in the periodic table so it has six electrons in its valence shell. This means that it needs to gain two electrons to obey the octet rule and have a full outer shell of electrons (eight).
Ответ:
55+35+80=180
25+65+90+180
The others are not possible as they do not have 180 degrees