An atom of element x has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. which is element x? a. sodium b. boron c. magnesium d. lithium

Element X is Na, sodium.

Be is in Row 2, Group 2 and has two valence electrons.

The element with one more shell of valence electrons is Mg, magnesium in Row 3, Group 2.

If the element has one less electron than Be, it must be in Row 3, Group 1: Na, sodium.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.