What is the change in momentum for a 12 kg rock experiencing 10 N of force for 12.5 s ?

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.

Wavelength divides in half and speed stays the same.

Answer the above statement is ( false );

I’m not sure about this question