chemistry Flashcards
what are the three states of matter
solid
liquid
gas
what is a solid
has shape ,high density and cannot be compressed
what is gas
highly compressible ,low density and can fill up any container
what is liquid
lesser density than solid and it can be slightly compressed
list 4 theories of matter
all matter is made up of atom particles
particles in matter are in motion
particles have spaces between them
all matter is composed of king particles too small to see
what is osmosis
the movement of molecules in areas of high convention to lower concentration
give an example of osmosis
if u put a potato in water it swells overtime
what is diffusion
the movement of molecules in areas of high concentration to lower concentration
give an example of diffusion
if you put a teabag in a cup of hot water it will defuse and change the colour of the water
what can ice turn to
ice can turn into water then water vapour by evapouration when water takes enough heat
what are atoms considered to be
the basic building blocks of matter
what is an atom
the smallest particle to ever exist
what are the 2 structures atoms are made up of
the nucleus and the shells
what is the nucleus
the center of an atom
what is the shells
surrounds the nucleus
what are the 3 fundamental particles together in an atom called
subatomic particles
what is a mass number
the total number of protons and nuerons
what are the 3 particles in an atom and the location
proton-nucleus
nueron- nucleus
electron- shells
what is the atomic number
the total number of protons can also state the number of electrons
what does the first shell do
holds up 2 electrons
what does the second n third shell do
holds up to eight electrons
what is the short name for the elements called
nuclear notation
what is the periodic table
the classification of discovered elements
how many discovered elements are there in the periodic table
118
what are groups
vertical colums in the periodic table
how many groups in the periodic table
8
1-7 and group 0
what are the 7 groups called
1-alkaline metals
2-alkaline earth metals
7-halogerus
0-noble gasses
