Question and answer
The atomic number of the element which does not usually form compounds because its outermost shell is full is: 8 16 18 19 20
3.The outermost shell of all atoms with two or more electron shells will not have more than 8 electrons
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Original conversation
User: The atomic number of the element which does not usually form compounds because its outermost shell is full is: 8 16 18 19 20

Weegy: 3.The outermost shell of all atoms with two or more electron shells will not have more than 8 electrons
iamhanifah|Points 850|

User: Each period of the periodic table ends with: alkali metals such as Na, K, Li, and Cs Period 7 elements Group VIIIA elements the oxygen family seven orbital shells

Weegy: Group VIIIA elements
selymi|Points 8932|

User: Which element in Period 4 is the most chemically active non-metal? Se Br Ge As

User: The number of positive charges in the nucleus of an atom is equal to: its mass number its atomic number Avogadro's number its atomic mass





Weegy: atomic number
Expert answered|reynaldo009|Points 210|

User: An atom is most stable when it has eight electrons in its outermost energy level. This is a statement of the octave octet valence balance rule.

Weegy: what is the question
Expert answered|reynaldo009|Points 210|

User: who applied quantum theory to atoms?

Weegy: Niels Bohr
Expert answered|reynaldo009|Points 210|

User: who did research on radioactivity?

Weegy: Marie Curie
Expert answered|reynaldo009|Points 210|

User: who discovered electron?

Weegy: Sir John Joseph Thomson
Expert answered|reynaldo009|Points 210|

User: who applied quantum theory to atoms?

Weegy: Niels Bohr



User: who expressed particles by wave equation?

Weegy: Schrödinger
Expert answered|reynaldo009|Points 210|

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Asked 9/28/2012 11:48:17 AM
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Weegy: It was in 1896, that the British Physicist, J.J Thompson and his colleagues named John S. Townsend and H. A. Wilson performed several experiments and conclusively proved the existence of electrons. So it was Sir J. J. [ Thompson who discovered electron. ] (More)
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