Explanation:
Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.
The bonds between oxygen and the hydrogen atoms within the water molecule are polar covalent bonds,i.e., the electrons are not shared equally between oxygen and hydrogen. Oxygen has a higher affinity for electrons than does hydrogen
ROW - ( 3 ) is correct
<u>SYSTEM</u><u> </u><u>(</u><u>A)</u>
Respiratory system - here gaseous exchange takes place.
<u>SYSTEM</u><u> </u><u>(</u><u>B)</u>
Digestive system - here nutrients from food is absorbed and assimilated .
<u>SYSTEM</u><u> </u><u>(</u><u>C)</u><u> </u>
Excretory system - removal of waste occurs
<span> under extreme heat or pressure
crystallize from magma
precipitate from a solution reaction of hot mixture with water and a dissolved substance</span>
I believe that the answer is A, continental-continental.
Answer:
the abbreviation form of full name is called symbol.
the smallest unit of cimpound is called molecule.
