chemistry quiz #1 flashcards

Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as

Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as

A compound

A compound can be decomposed by

a chemical reaction

A compound always has a

homogenous composition

A heterogenous material may be

A mixture

A mixture can

be seperated by physical means

What must be a mixture of substances

A solution

Can you chemically break down a compound

Yes

Can you chemically break down an element

No

what is CCI4 classified as? compound or element?

a compound

what is a pure substance with only 1 atom

An element

What is a pure substance with more than 1 atom

A compound

what is a substance that cant be broken down

pure substance

characteristics of solid matter

^>Definite volume

>Definite shape

>particles vibrate

> symbol (s)

characteristics of liquid matter

> definite volume

> takes shape of container

> constant motion

> symbol (L)

characteristics of gas matter

>no definite volume

> fills a container(spread)

> compressible

> greatest amount of movement

> symbol (G)

characteristics that don’t change the substance is known as

physical change

what is it called when NO NEW SUBSTANCE is produced

Physical change

A sign of physical change

still the same substance but in different form

characteristics thatchange the substance is known as

Chemical change

what is it called when A NEW SUBSTANCE is made

Chemical change