test
what is scientific notation?
a format used to rewrite very large or very small numbers in an easier way
matter definition
anything that has mass and volume
mass definition
a measure of the amount of matter
volume definition
a measure of how much space something takes up
atom:
the smallest unit of an element that maintains the identity of the element
atoms are...
the building blocks of matter
element
a pure substance that cannot be broken down into something simpler or stabler
diatomic elements
H2, N2, F2, O2, I2, Cl2, Br2
elements can be found
anywhere on the periodic table
compund:
a pure substance that CAN be broken down into simpler substances (elements). Compunds are made by chemically combining atoms of 2 or more elements
Substances are;
elements and compunds
traits to identify pure substance;
-fixed composition throughout. -same properties throughout
mixtures definition
variable composition throughout, each component retains its unique properties, can be seperated into substance
homogenous mixture
appears "blended/same" and can be physically broken down into components
heterogeneous mixture
different components are clearly seen (or seperated over time) and can be physically seperated even easily. uneven distrubution
solution
a homogenous mixture where a Solute is dissolved into a Solvent
Solute Definition
the thing that gets dissolved
Solvent definition
the thing dissolving
Aqueous Solution
When the solvent is water
alloy
solution made of metals
extensive;
depends on the amount of matter present... (property will change along with the changes of the thing)
intensive;
properties stay the same no matter the amount of matter
examples of extensive
mass, volume, amount of energy
examples of intensive
combustibilitY, densitY, melting point, boiling point, specific heat
physical properties
can be observed WITHOUT changing the identity of the substance
physical property examples;
density, mass, colour, boiling point, state
STATES OF MATTER
solid: definite shape definite volume
liquid: indefinite shape defin volume
gas: both indefinite
chemical properties
properties that can only be observed by changing the substances composition/identity
chemical properties examples
reactivity, ability to decompose, instability