Periodic table
The elemental symbol for Helium
He
This state of matter has little space between each particle
Solid
The process where no new substance is formed
An ____ is the smallest part of one type of element
Atom
Chemistry is the study of ____
Matter
The atomic number of Boron
5
The process of ice becoming water
Melting
Vaporisation is a _____ change
Physical
Two hydrogen atoms and one oxygen atom make up this compound
Water (H20)
This state of matter has very weak attractive forces
Gas
The atomic mass of Lithium
6.941
The opposite of evaporation
Condensation
A permanent colour change is an example of this reaction
Chemical reaction
When _____ is added to a substance, the molecules and atoms vibrate faster
Heat/Temperature
This molecule is also known as Carbon dioxide
CO2
Weighs
The point at which water boils (in degrees)
100oC
Combustion is an example of a _____ reaction
Chemical
The part of an atom with a positive charge
Proton
Water is known as the universal ______
Solvent
An element with a symbol that does not correspond with the first letter/s of it's name
Iron, Sodium, Copper, Silver, Tin, Lead, Tungsten, Potassium
The opposite of sublimation
Deposition
Recycling paper is a form of a ____ change
Physical
This kinetic energy is only found in gas
Rotational
CH4 + O2 ---> CO2 + H20
Is this equation balanced?
Unbalanced