chemistry second ABCD

Question 1

what is an atom

Answer 1

smallest indivisible particle of matter

Question 2

what is a molecule

Answer 2

two or more atoms

Question 3

what is an element

Answer 3

a pure substance consisting of only one atom

Question 4

What is a compound

Answer 4

a substance consisting of two or more elements

Question 6

what is a boiling point

Answer 6

the temperature at which a liquid turns into a gas upon heating

Question 8

properties of a solid

Answer 8

fixed shape and volume particles are closely packed and vibrate in place

Question 9

what is a homogeneous muxture

Answer 9

uniform composition throughout

Question 9

properties of a liquid

Answer 9

Does not have a fixed shape and particles are loosely spaced

Question 10

prpoerties of gas

Answer 10

no fixed shape or volume and particles are widely spaced

Question 11

what is a heterogeneuos mixture

Answer 11

non uniform composition

Question 12

what are colloids example

Answer 12

Mixtures where tiny particles are dipersed but not settled e.g milk

Question 13

what are suspensions

Answer 13

mixtures where the large particles settle over time e.g muddy water

Question 14

what are alloys

Answer 14

Mixtures of metals e.g steel and bronze

Question 15

what are emulsions

Answer 15

mixtures of two immiscible liquids

Question 16

what is simple distilation used for

Answer 16

separating mixtures of solid and liquid solutions

Question 17

what is chromatography used for

Answer 17

separating components based on their movement through a medium

Question 17

what is fractional distillation used for

Answer 17

separating mixtures of liquids with similar boiling points

Question 18

what is centrifugation used for

Answer 18

separating mixtures of different densities