The element symbol for hydrogen is

1 space Wrong: Go back 1 space The most abundant element in the body by mass is Oxygen Correct: move ahead 1 space Wrong: Go back 1 space A substance composed entirely of atoms with identical atomic numbers is called an element Correct: move ahead 1 space Wrong: Go back 1 space The three elements that are found in the human body in the greatest quantity are H, O, C Correct: move ahead 2 space Wrong: stay where you are The most abundant element in the body by # of atoms is Hydrogen Correct: move ahead 1 space Wrong: Go back 1 space A tiny, chemically indivisible particle made up of protons, electrons and sometimes neutrons. Atom Correct: move ahead 1 space Wrong: Go back 1 space The most abundant element in the universe is -- H Correct: move ahead 1 space Wrong: Go back 1 space In C 12 , the 12 refers to what -- Mass number Correct: move ahead 1 space Wrong: Go back 1 space An isotope of an element is determined by its number of neutrons Correct: move ahead 1 space Wrong: Go back 1 space The second most abundant element in the universe is Li Correct: move ahead 2 space Wrong: stay where you are The periodic table of elements is arranged how. By increasing atomic number Correct: move ahead 1 space Wrong: Go back 1 space The most stable of all heavy elements is Lead Correct: move ahead 1 space Wrong: Go back 1 space One of the heavy elements that has no stable isotopes uranium Correct: move ahead 1 space Wrong: Go back 1 space<br><br>

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