full quiz

Alkali metals

Group 1 very reactive

Alkaline metals

Group 2 reactive

Halogens

Group 17 very reactive

Chalcogens

Group 16 reactive

Noble gas

Group 18 non reactive

Metals

Good heat conductor, shiny

Non metals

Dull, brittle, bad heat conductors

Metalloids

Have both properties

Protons

Positive charge

Electron

Negative charge

Neuton

Neutral charge

Whats the atomic number

The number of protons

Atomic mass

How much neutrons and electrons

How to find the number of neutron

Atomic mass - Atomic number

Solution

A mixture thats evenly mixed

Suspension

A mixture with big particles that can be seen

Colloid

A mixture with smaller particles

physical propertie

A property you can see that you cant change

Chemical property

A substance that can turn into another substance

An atom

Smallest units that make up matter

Pure substance and example

Matter with only 1 type of particle

Ex. Pure water

Element and example

substance made of 1 atom

Ex. Hydrogen

Compound and example

2 elements that are combined

Ex. H2O

Mixture and example

Matter with 2 types of particles

Empedocles

Made 4 elemts

Democritus

Discovered atoms

Aristotle

Discovered transmutation

Alchemists

Turning a substance into sumn valuable

Robert boyle

Says science should be evidence not belief

Joseph priestly

Discovered and named oxygen

Bacon

Knowledge comes from observing

Antoine

Identified oxygen scientifically