Question

define valance electron ?where are valance electron sitauted in a atom

Answer 1

HEY MATE HERE IS YOUR ANSWER....

THE ELECTRONS PRESENT IN THE OUTERMOST SHELL OF AN ATOM ARE KNOW AS VALENCE ELECTRONS.
FROM BOHR BURY SCHEME WE ALSO KNOW THAT THE OUTERMOST SHELL OF AN ATOM CAN ACCOMMODATE A MAXIMUM OF 8 ELECTRONS.

SOURCE:MY SCIENCE TEXT BOOK..


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Answer 2

$\underline{\underline{\Huge\mathfrak{Answer:-}}}$

Valence electron can be defined as the electron revolving in the outermost orbit which are weakly held by nucleus.

Valence Electron is not situated but revolving around the nucleus in the outermost orbit of the atom.