Card Set Information
what is the smallest unit of an element?
what is the smallest unit of a covalent compund?
is tap water a compound, homegeous or heterogenous mixture?
what is the trend in size for the elements on the periodic table?
diameter increases as u go down-diameter decreases as u go across
on the periodic table, columns are known as?
groups or families
on periodic table rows across are known as?
the number of protons contained in the nucleus is?
the weight of the atom(equal to number of protons plus neutrons) number is always a whole number
mass number (numbers on periodic table have decimals & those are average atomic masses-always round to nearest whole #)
atoms that have different number of electrons
ions-they can be positive or negative
atoms that have different number of neutrons
isotopes-they dont have a charge unless there is one noted
what is the name of the law that says that compounds must combine definite ratios?
law of definite proportions
what is the name for positively charged ion?
what is the name for negatively charged ion?
metals tend to gain or lose electrons in order to become stable?
what is rule that states atom is most stable when it has 8 electrons in its valence shell?
what law states that all atoms in a chemical reaction from the reactants must be accounted for in the products-sum of all masses of reactants=sum of the masses of products
law of conservation of matter
what law states that all compounds no matter wher the sample was taken, are created by the combination of elements in the same definite proportions
law of definite proportions
atoms are created from 3 smaller particles
protons neutrons electrons
which compound is formed by bonds made between an anion and a cation resulting from an exchange of electrons?
which bonds are formed from the sharing of valence electrons?
what is the measure of the attraction of electrons to the nucleus of an atom in a covalent bond-also increases from left to right-decreases from top to bottom periodic table
what are the 5 types of chemical reactions?
decomposition, synthesis, single replacement, double replacement, acid base neutralization
what is another name for a homegeneous mixture
what are 3 steps in breaking apart a solution?
separation of solute, separation of solvent, interaction between solvent/solute particles
the amount of solute that can be dissolved in a solvent
solubility-generally increases with temperature or gases in liquids increase with pressure
substance that gives a H+(proton) when dissolved in solution-also tastes sour, turns litmus red, reacts with many metals to produce H2 gas
substance that gives up OH+when dissolved in solution(accepts a proton)-also tastes bitter, slippery to touch, turns litmus dk purple
substance that breaks apart in water to produce inos, making solution able to conduct electricity
what happens when acids and bases are mixed together and H2O is produced?
acid base neutralization