diversity of matter by its chemical compostition Flashcards
1
Q
what is an element?
A
- Basic building blocks of living and non living matter
- Pure substance that cannot be broken down (cannot be decomposed) into simpler substances
2
Q
what is a compound?
A
Pure substance consist of two or more elements chemically combined together
3
Q
what is a mixture
A
Substance made up of two or more element and/or compounds that are not chemically combined together
4
Q
what are metalloids?
A
have properties of both metals and non-metals
5
Q
difference between metal and non metal
A
- metal shiny and lustrous, non metal not
- metal high density, non metal low
- metal good conductor of heat, non metal bad
- metal malleable and ductile, non metal not
- metal high mp and bp, non metal low
6
Q
what are properties of compounds
A
- Components cannot be separated by physical methods
- Fixed composition
- Different from its original elements
- Fixed melting and boiling points
7
Q
what are properties of mixtures
A
- Components can be separated by physical methods.
- Same properties as the substances of which it is made up
- Range of melting and boiling points
- No fixed composition
8
Q
what are alloys
A
Mixture of a metal with other elements (sometimes with non- metals)
9
Q
what is a solute
A
the substance that dissolves
10
Q
what is a solvent
A
the substance that the solute dissolves in
11
Q
how to tell of something is a solution
A
light can pass through the substance
12
Q
when more solute is added=
A
more concentrated
