Chemistry 16

atoms

the fundamental building blocks of everything around us

when a solid material melts, what would a chemist say was happening to it?

the solid is melting because its particles are over heated

chemistry

the study of matter and the transformations it can undergo

macroscopic

visible to the naked eye; not microscope

melting

when a solid changes to a liquid

when we heat water, it becomes hotter and hotter and then it begins to boil (evaporating very quickly ) . If it was fresh water and at sea level , what is the temperature?

100 degrees C

molecule

a submicroscopic particle consisting of a group of atoms

most chemists are interested in what type of research?

applied

what must you do to an object to change it from its solid phase to its gas phase?

apply heat

submicroscopic

beyond the microscopic level - the realm of atoms and molecules and an important focus of chemistry

what must you do to a material to change its phase?

change its temperature/ apply heat

why is chemistry often described as the central science?

it touches all the other sciences

T or F : as soon as water hits boiling temperature it keeps getting hotter

False

what is the chemical symbol for water?

H2O

T or F: submicroscopic refers to the realms of atoms and molecules

T

phase

a physically distinctive for of matter ex. solid, liquid, gas

what are the terms we use for liquids and gases that change from one phase into the other?

evaporation and condensation

when a liquid changed back into a solid

freezing

When the molecules of a material are far apart and flying around at about 500 m/s and banging into one another, what phase?

gas

when the molecules of a material are loosely bound together , but can slip and slide by one another. what phase?

liquid

atoms can link together to form what?

molecules

the american chemistry council stresses the importance of manufacturers using chemistry wisely, so that waste products can be

recycled, minimized, engineered into useful products, rendered environmentally safe

microscopic

so small as to only be visible by microscope

when the molecules of an object are tightly bound together and cannot move around except to vibrate. what phase?

solid

what are the three phases of matter?

solid, liquid, gas