Bio 2 Unit Quiz

0.0(0) Reviews
Report Flashcard set

Spaced Repetition

Scientifically backed study method

spaced repetition


Review terms and definitions



Study with MC, T/F, and other questions


Practice Test

Take a test on your terms and definitions



53 Terms
😃 Not studied yet (53)
anything that has mass and takes up space, made of atoms
the smallest unit of matter that can't be broken down (w/o releasing charged subatomic particles)
solid, liquid, and gas
What are the three forms of matter?
definite shape and volume, particles are close together and organized, particles vibrate, and the highest density
no definite shape but definite volume, particles have some space between them, particles slide past each other middle density
no definite shape or volume, particles are very spaced out w/ little to no organization, particles are fast moving, the least density
atoms have a +/- charge
mass number
protons + neutrons, the weight of atom
atomic number
the number of protons
protons, neutrons, and electrons
What are the three charges that make an atom?
positive charge (+), located in the nucleus, determines which element it is, have about the same weight has neutrons
no charge, located in the nucleus, the change of ______ means the change to the mass number, same elements with different mass (isotope)
negative charge (-), no weight, number of electrons change (ions), located in electron cloud (shells)
2, 8
How many electrons are in the first shell? How many electrons are in all the other shells?
a positively charged ion
a negatively charged ion
a substance that can't be broken down to other substances by ordinary chemical means
a substance consisting of two or more different elements combined in a fixed ratio
atomic mass
the weight (protons + neutrons)
an atom that has the same number of protons but a different number of neutrons
valance shell
number of electrons present in the outermost shell, determines the chemical properties of an atom
chemical bonds
when two atoms with incomplete outer shells interact (give up, share, and accept electrons), they will both end up with a completed out shell and then the atoms stay close together
covalent bond
a chemical bond that involves sharing a pair of electrons between atoms in a molecule, the strongest bond, between nonmetals (right side of PT)
bonding capacity of an atom
two or more atoms held together by covalent bonds
measure of its attraction for shared electrons
non polar covalent bond
equal sharing of electrons, equal electronegativity of two atoms, no charge
polar covalent bond
a bond when both atoms differ in electronegativity, unequal sharing of electrons, slightly positive and slightly negative
ionic bond
receiving/losing of an electron, metal with a nonmetal, a large difference in electronegativity, middle bond
hydrogen bond
must be paired with two polar molecules, function in proteins, properties of water, weakest
they have slow particles, more stable
What happens to hydrogen bonds in cold temp?
fast particles, least stable
What happens to hydrogen bonds in high temp?
a substance that does the dissolving
substance that gets dissolved
solute + solvent
polar (attracted to each other) and ionic (the charge of the bond)
polar bonds can dissolve what other bonds and why?
existing or taking place within a molecule (covalent and ionic bonds)
existing or acting between molecules (hydrogen bond)
non polar bonds (they have no charge)
What can polar bonds no dissolve?
surface tension
intermolecular force, a measure of how difficult it is to stretch or break the surface of a liquid
high specific heat
it needs to absorb a lot of energy before its temperature changes
chemical reactions
breaking existing chemical bonds
the tendency of a molecule to stick together (trees get their nutrients)
clinging of one substance to another
thermal energy
the energy associated with the random movement of atoms and molecules
a substance that donates hydrogen ions to solutions
substance that reduces the hydrogen ion
pH scale
how acidic or basic a solution is
organic substances that maintain a constant pH over a given range by neutralizing the effects of hydrogen ions.
What form on Earth has all three matters naturally
they already have a full outer shell
why don't noble gases form covalent bonds
metals don't hold onto electrons very well
Why don't metals form covalent bonds
the ice is less dense than the water, the water is heavier so it displaces the ice
Why can ice float on water even though it's a solid?