Elements in Group 18 are known as the noble gasses. What makes
these elements unlikely to react?
A the number and placement of the
protons
B the number of isotopes of the atom
C the number and placement of the
electrons
D the number of neutrons in the nucleus
of the atom

Chemistry worksheet - i am not sure what they are asking for exactly?

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.