The atomic symbol represents
A) the number of electrons in an atom of an element.
B) the name of the element.
C) the history of the element.
D) All of the above.
E) Only two of the above.
Question 2
When we breathe we inhale oxygen, Image, and exhale carbon dioxide, Image, plus water vapor, ImageO. Which likely has more mass, the air that we inhale or the same volume of air we exhale? Does breathing cause you to lose or gain weight?
A) The air we inhale has more mass; Breathing causes you to lose weight.
B) The air we exhale has more mass; Breathing causes you to lose weight.
C) The air we inhale has more mass; Breathing causes you to gain weight.
D) The air we exhale has more mass; Breathing causes you to gain weight.
Electron atomic and molecular orbitals
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Atom formation
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