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Chemistry unit 1

A mixture two or more substances not chemically joined
An element made up of only its own atoms and it cannot be broken down into any other substance
A compound two or more substances that are chemically joined
Neutrons neutral charge, no charge
Electrons negative charge
Shells the paths in which electrons move
Name 3 subatomic particles protons, neutrons and electrons
2........ atoms will have ....... amounts of protons, neutrons and electrons different x2
Proton number amount of protons
What is the smallest particle? An atom
How many elements are there approximately in the periodic table? 100
Malleable can be hammered or pressed into shape without breaking or cracking
Sonorous capable of giving out a deep resonant sound
Density how much of the substance occupies a specific volume
Ductile able to be deformed without losing toughness
Typical metal properties conductor of electricity, good conductor of heat, shiny, high density, malleable, sonorous
Typical non metal(solid) properties insulator, poor conductor of heat, dull, low density, brittle, not sonorous
Name 4 metals zinc, aluminium, iron, copper Non metals
Main difference between ductile and malleable ductile reverts back to its original shape, malleable stays in the new bent shape
Protons Positive charge
What is a period across
What is a group down
Group 1 the alkali metals
Group 2 the alkali earth metals
Group 7 the halogens
Group 8/0/18 the noble gases
Group 1 elements reaction to water fizzing, smoke, flames
With the halogens, the colour..... as you go down darkens
With the halogens, reactivity.........as you go down increases
Displacement reaction when one material replaces another
What are the 2 rules of displacement reactions? the one that displaces will replace each other if they are in the same group
Created by: 7bhu


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