biochemistry Flashcards
the study of matter and the interaction of atoms
chemistry
the building blocks of matter, the smallest piece of an element that still has properties of that element
atom
Name the three major particles in an atom. Give their charge, location, and mass.
proton - positive, in nucleus, 1amu
neutron - neutral, in nucleus, 1amu
electron - negative, outside nucleus (electron cloud), 1/1836amu
the amount or matter in an object
mass
With what unit is mass measured?
kilograms
the amount of space an object takes up
volume
With what unit is volume measured?
liters or cubic meters
mass/volume
density
What is the density of water?
1 gram/milliliter
If something is more dense than water, it…
sinks
If something is less dense than water, it…
floats
a pure substance made of only one type of atom
element
atoms of the same element with an unusual number of neutrons and a different mass
isotopes
isotopes that are unstable and emit particles
radioisotopes
What is the difference between boron 10 and boron 11?
Boron 11 has an extra neutron and a mass of 11
What are some uses of radioisotopes?
diagnose and treat diseases
find the age of artifacts
our chart of the elements
periodic table
How are the elements on the periodic table arranged?
increasing atomic number or number of protons
Who named the atom, and what does the word mean?
Democritus - unable to be cut or divided
two or more different atoms chemically combined to make a new substance with new physical and chemical properties
compound
the force that holds atoms together
chemical bond
a bond formed by the transfer of electrons
ionic bond
a bond formed by the sharing of electrons
What are the types?
covalent bond
- share 1 pair - single
- share 2 pair - double
- share 3 pair - triple - basically as high as it goes
a charged atom
ion
What are the two types of ions? How do they form?
cations - positive ions - lose electrons
anions - negative ions - gain electrons
What happens to oppositely charged particles?
attract
What happens to like charged particles?
repel
the smallest piece of a covalent compound
molecule
a weak bond formed by a polar hydrogen bonding
hydrogen bond
a bond formed by the unequal sharing of electrons
polar covalent bond
a solution with more hydrogen than hydroxide, sour, corrosive
acid
a solution with more hydroxide than hydrogen, bitter, and caustic
base
the ion in acids
hydrogen + (hydronium)
the ion in bases
hydroxide
another term for basic
alkaline
a heterogeneous mixture where the particles don’t settle but can be seen
colloid
a heterogeneous mixture where the particles are extremely large and settle out upon standing
suspension
a homogeneous mixture of a solute in a solvent, the particles are extremely small and can’t be seen, don’t settle
solution
a solution where water is the solvent
aqueous
a radioisotope commonly used to find the age of fossils
carbon-14
a reaction where you mix acids and bases (3 terms)
neutralization
exchange
double replacement
a major type of chemical reaction where large molecules are broken into smaller ones
decomposition (catabolic)
a major type of reaction where small molecules are joined together to build larger ones
synthesis (anabolic)
characteristics observed and measured without permanently changing the matter
physical properties
characteristics which describe matter’s ability to react and change into new substances
chemical property
unstable isotopes which break down or decay into smaller materials
radioisotopes
the general area outside the nucleus where electrons are found
electron cloud
the more specific areas in the electron cloud where electrons are found (4 terms)
energy levels
shells
orbitals
rings
the outer most ring of electrons
valence
How many electrons can each of the first three energy levels hold?
2-8-18
the rule that describe what makes a stable outside ring of electrons
octet rule - the outer ring needs to be full or have eight electrons to be stable
the general term for all the particles within an atom
subatomic
the meaning of the arrows in a chemical reaction
yields
the most important polar covalent compound to life on Earth
water