HELP ASAP PLZZZ please keep it in simple words I am foundation paper

This question is about substances with covalent bonding. Suggest one limitation of using a ball and stick model for a water molecule.

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

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

How can the number of core electrons be determined from the periodic table