How do the isotopes of Be-9 and Be-7 differ? A. Be-9 has 2 more electrons than Be-7.
B. Be-9 has 2 more protons than Be-7.
C. Be-9 has 2 more neutrons than Be-7.
D. There is no difference. They are exactly the same.

How are elements arranged in a periodic table

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3

The three types is stress that act on earths rocks are compression, tension, and