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Quiz on 2.1 and 2.2

BIOLOGY

QuestionAnswer
all living things are based on atoms and their interactions
atom smallest basic unit of matter
element one type of atom
atom contains nucleus and electrons
nucleus contains protons and neutrons
where are the electrons energy levels outside the nucleus
atomic mass - atomic number= number of neutrons
compound is made of atoms of different elements bonded together
water abbreviation H2O
carbon dioxide abbreviation CO2
many carbond based compounds in living things
ions form when atoms gain or lose electrons
ion atom that has gained or lost one or more electrons
what are the two types of ions positive and negative
ionic bonds form between oppositely charged ions
covalent bond forms when atoms share a pair of electrons
type of polar molecule water
polar molecules have slightly charged regoins
nonpolar molecules do not have charged regions
hydrogen bonds form between slightly positive hydrogen atoms and slightly negative atoms
three important properties of water high specific heat, cohesion,and adhesion
what is responsible for the three important properties of water hydrogen bonds
solution is formed when one substance dissolves in another
solution is what type of mixture homogeneous
where do solvents dissolve in other substances
where do solutes dissolve in a solvent
what do polar solvents dissolve polar solutes
what do nonpolar solvents dissolve nonpolar solutes
what two substances generally remain separate polar substances and nonpolar substances
what does acid release and when does it release it hydrogen ion when dissolves in water
what are the pH levels for an acid less than 7
what is another name for base alkaline
what pH level is neutral 7
what are the pH levels for a base 8-14
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