1. nitrogen, oxygen, and fluorine atoms all seem pretty similar, at first. how many valence electrons does an atom of each have? (4 points) nitrogen oxygen fluorine
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Ответ:
oxygen is 6 valence electrons
fluorine is 7 electrons
Ответ:
Area of the rectangle = ( x²+12x+27)unit²
Step-by-step explanation: Length = x+3 Breadth = x+9
∴ Area of Rectangle = L×B
(x+3)(x+9) = x²+9x+3x+27 = (x²+12x+27) unit²