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23 terms

biology unit 2 quiz 3 lesson 5

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when atoms combine, interactions occur between their ___________
electrons
when electrons are shared, the type of bonding is called
covalent
the bonds that link many water molecules together to form a water group are_____
hydrogen
six electrons in its n. = 2 shell will become an ion with a charge of
-2
the heat needed for chemical reaction to take place
activation energy
u substance which helps a reaction to take place but does not take an active part is an
catalyst
a catalyst for chemical reactions in biological system
enzyme
The signed number telling how many electrons an atom will usualy recieve or lose
valence
subatomic particles that lack an electrc charge
neutrons
ID the type of chemical reaction: H (2)CO(3) to H(2)O + CO(2)
decomposition--one thing breaking down into 2 things
NH(3)+H(2)O to NH(4)OH
synthesis- two things into one
H(2)SO(4)+2kOH to k2so4+2H20
exchange-
The four most abundant elements in the body are
Carbon, Hydrogen, Oxygen and Nitrogen
The type of chemical bond formed when oppositely charged ions attract each other is called
ionic
A compound which produces H+ions in solution is a
Acid
Neutrality on the pH scale
7
All organic molecules contain the
element carbon
Substances which maintain a body's pH within narrow limits are called _____
buffers
The products and reactants of a versible reaction will form at the same rate when equilibrium is
attained
what is expected when reactants break bonds?
energy output
an reaction occurs when a molecule is formed from the bonding of
atoms, ions or simpler molecules
an reaction occurs
when the bonds of the reactings compounds are broken and new combinations are formed
( true/False) a plant must supply energy through photosynthesis in order for its complex startch molecules to turn to simple sugar
False