ch 11 pre-quiz

distinguish between atoms and molecules. whis is made of which?

?

an infant gains 10 pounds, why would you consider this to be an example of a chemical change?

??

is chemistry the study of the submicroscopic, the microscopic, or all three?

all of the above bc most everything is made of atoms and molecules

the proper name for the chemical compound NH4NO3 is

ammonium nitrate

chemistry primarily focuses on

atoms and their interactions

consider a steaming aluminum soda-pop can that contains a small amount of boiling water. when it is quickly inverted into a bath of coller water, the can is crushed by atmospheric pressure. this occurs bc the pressure inside the can is rapidly reduced by

condensation of steam inside

one example of a periodic trend is the

decrease in atomic size moving from left to right across the periodic table

the proper name for the chemical compound N2O is

dinitrogen oxide

elements within the same....tend to have similar properties

group

when bringing water to a boil in the mountains, the time needed to reach the boiling point is

less than at sea level

The phase in which atoms and molecules no longer move is the

none of the above...liquid, gas, solid phase

can be made into thin sheets

physical

conducts electricity

physical

turns into a silvery liquid when heated in the absence of oxygen

physical

one element is distinguished from another by the number of

protons

gases are so much easier to squeeze into smaller volumes than liquids or solids bc

there is so much space in between the submicroscopic particles

we are warmed by condensation because water molecutles in the air that strike out bodies

transfer some of their kinetic energies to us