atoms
Matter is anything that has mass and takes up space
What is matter?
An Element with the atomic number of one
(hint: Chemical symbol is H)
Hydrogen
Pure Substance that cannot be changed into a simpler substance by physical or chemical means
Elements
A new substance has been formed; Irreversible
Chemical change
what is the chemical equation for Oxygen
O2
the three states of matter are...
solid, Liquid, and gas
How many electrons fit on the first energy level?
2
Element or compound
Baking Soda
Compound
Density, Melting point, Boiling Point, Solubility is an example of?
physical property
Whats the chemical formula for Baking Soda
(has 6 atoms)
NaHCO3 or NaClO
The smallest pieces of matter are called____
atoms
How many electrons can fit in the second energy level
homogenous or heterogenous
Seawater, air
homogeneous
An iron chain rusting is...
a chemical change
What is chemical formula for table salt?
NaCl
The 4th State of Matter that behave like a liquid and a solid.
Plasma
What number tells you the number of protons and electrons?
Atomic Number
homogenous or heterogenous
chocolate chip cookies
heterogeneous
crushing a can is an example of
a physical change
What is the chemical formula for water?
H2O
The center of an atom is called the_____________.
Nucleus
Subtract the atomic number from the atomic mass
How do you figure out the number of neutrons?
Two types of mixtures
Heterogeneous and homogeneous
Why is freezing water a physical change
It's only a change in state. no new substance has been formed
in a chemical reaction mass is neither created nor destroyed.
Law or conservation of mass