The nature of matter 5.1 - 5.6 Flashcards
What is chemistry?
Chemistry is the study of matter and the all the changes it experiences
What is matter
Matter is anything that has mass and takes up space
What is the particle theory
- All matter is made up of particles with spaces between them
- Different substances are made up of different types of particles ( water and a pencil are not made of the same particles )
- Particles move constantly and randomly
- Particles attract each other ( solids have the greatest, gasses have the weakest )
- Particles move faster as gets hotter ( weakens the attraction force of the particles )
What is a pure substance
A substance made up of only one type of particles
What is a mixture
A substance made up of at least two types of particles
Mechanical Mixture ( heterogeneous mixture )
A mixture where you can distinguish between the difference types of matter
Solution ( homogeneous mixture )
A uniform mixture of 2 or more substance ( has to be clear )
What is an alloy
A solid solution made up of two or more metals
Physical change
A change where the composition of the substance stays the same and no new substances are formed
qualitative
A property observed with your five senses
quantitative
A property that is measured and given a number value
Luster
shininess or brittleness; silver is high on luster
Clarity
The ability to allow light pass through; transparent is completely clear, when you can barely make out the other side that is translucent, opaque is a cement wall
brittleness
Break ability of flexibility; glass is high on brittleness[.
Viscosity
The ability of a substance to pour or flow; honey is more viscous then water
Hardness
The ability to be scratch or be scratched by another substance; diamond is high on hardness
Malleability
the ability to be hammerd into thinner sheets or models; silver is malleable, glass is not
ductile
The ability to be pulled into thinner strands; copper is very ductile
Electricity conductivity
The ability to allow an electric current pass through it.
Physical properties
A characteristic of a substance that can be determend without changing its composition
Chemical properties
A characteristic of a substance that is determined when its composition changes and one or newer substances are produced
chemical change
A change in the initial substance where one or more substances are produced