According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail (a) creates a friction with the hammer.
(b) disappears into the wood.
(c) exerts an equal force back on the hammer.
(d) moves at a constant speed.

What is important to study for nios grade 12 chemistry? i have only one month left.

C3h8o3 - glycerol major species present when dissolved in water

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false