Composition of Matter
What is the difference between an element and a compound
an element is only 1 element whilst a compound is multiple elements
an example of a physical change
color, change in state, etc.
Do prefixes matter in an ionic bond?
No
An ionic bond forms between _____ and ______
metals and nonmetals
What do you change to balance chemical equations
Coefficients
what is it called when a substance moves from gaseous state to a solid state
sublimation
you need to produce an experiment to observe a physical change
False
what is the atomic mass
Protons + Neutron weight
is a covalent bond sharing or giving and taking electrons
sharing
what is on the left side of the arrow
reactants
what state of matter has a shifting shape but a constant volume
liquid
Is a new substance formed in a chemical reaction
yes
Oxidation numbers show ___
the amount of element is present in the substance
how many electrons it moves to get a 0-8 rule
what does (aq) mean in a chemical equation
is concrete homogeneus or heterogeneus
heterogeneus
How do you balance chemical equations
By changing the coefficents
what is the chemical symber for Oxygen
O
Positive
what does the small number after the element called
subscript
energy can not be ______ or ______
created, destroyed
do you gain energy or lose energy in a melting reaction (solid --> liquid)
Gaining Energy
name all prefixes from numbers 1-10
mono, di, tri, tetra, pent, hex, sept, oct, non, dec
Is NaCl an Ionic or Covalent bond
Ionic
CH4+O2 --> CO2 +H2O
Combustion