Particle Theory
Things that have mass and take up space.
What is matter?
A substance made up of only one type of atom.
What is a pure substance?
A characteristic that can be measured without destroying the original substance.
What is a physical property?
Vertical columns of elements in the periodic table.
What are groups or families?
Particles with a positive charge found in the nucleus.
What are protons?
All matter is made up of these that have empty spaces between them.
What are tiny particles?
A substance made up of two or more different atoms bonded together.
What is a compound?
Describes how a chemical reacts / behaves.
What is a chemical property.
Stable gases that have a full valence shell.
What are the noble gases?
What are neutrons?
Particles are in constant random blank.
What is motion?
A mixture that appears as one phase (uniform)
What is a homogeneous mixture?
Colour, odour, malleability, melting point, and solubility.
What are physical properties?
Extremely reactive metals.
What is the alkali metals?
Particles with negative charge found in orbits around the nucleus.
What are electrons?
The particles of a substance moves faster as this increases.
What is temperature?
A mixture that appears as 2 or more phases.
What is a heterogeneous mixture?
Reacts with water, corrodes, flammable, acid or base.
What are chemical properties?
Extremely reactive non-metals.
What are the halogens?
The number of protons in an atom which determines the element.
What is the atomic number (Z)?
The forces of attraction are stronger when particles are blank together.
What is closer?
A heterogeneous mixture that appears homogeneous because small particles are suspended in the solution.
What is a colloid?
New colour, new odour, new gas, new solid, heat/light is produced.
What are chemical changes?
Good conductors of heat and electricity.
What are the alkaline earth metals?
The symbol A, which represents the number of protons and neutrons in the nucleus of an atom.
What is the Mass number/Atomic mass (A)?