what is matter?
all substances are considered as matter
what are the three main states of matter?
solids, liquids and gases
What is a property?
the properties of a pure substance will always remain the same
what is a physical property?
physical properties are what we can observer and measure
what is some physical properties?
colour, texture, boiling point, density, electrical conductivity, heat capacity, how readily is dissolves in other substance or be dissolved itself
what is a chemical property?
chemical properties refer to what a substance does in a chemical reaction
what is some chemical properties?
permanent colour change, bubbling or permanent change of state
who first thought of atoms?
Democritus proposed that all matter is made up of particles called atoms
what is Daltons theory?
1) All matter is made of atoms. Atoms are indivisible and indestructible. 2) All atoms of a given element are identical in mass and properties. 3) Compounds are formed by a combination of two or more different kinds of atoms.
what is the kinetic/particle theory of matter?
It describes how the amount of the kinetic energy(KE) in each partice determains the state of the matter(solid, liquad or gas)
particle energy - solid
the particles have littile kinetic ener(KE) as the particles vibrate about a fixed point
particle energy - liquad
the particles jottle about. Particles in a liquad state have more KE than in the solid
particle energy - gas
the particles move fast and on their own. Particles in a gas have the highest amount of KE
the kenetic theory of matter can be used to explain...
mass is the amount of matter in a substance, mass depends on the number of particles and mass of ech individual particle, a specific volume of solid or liquad has a greater mass as the same volume of gas due to having more particles in it, a peice of lead has a much greater mass than a same-sized peice of aluminium because lead atomes have a greater mass than aluminium atoms
what is dffusion?
Diffusion occurs when the particles of a substancespread out and takes up all the space they can.
what are the physical properties of matter?
how much force the substance can withstand (strength), its ability to scratch other objects (hardness), its ability to scratch other objects (hardness), how much it can be compressed (compressibility), the number of particles in a certain volume (density)
density
density = mass/volume