physical or chemical
is rust a chemical or physical change?
it's a chemical change because the rust cannot change back.
what is H on the periodic table
H is hydrogen
define element
A pure substance made of only one kind of atom
what are the three states of matter
solid, liquid, and gas.
is water freezing chemical or physical?
it's a physical change because the chemical composition is still the same, the only thing that changes is the state of matter.
what is the chemical symbol for Helium?
the chemical symbol for Helium is He.
define filtration
A process that separates materials based on the size of their particles.
heat
is wood burning chemical or physical?
chemical
what is the chemical symbol for Iron?
The chemical symbol for Iron is Fe.
define density
mass/volume
What are three ways that the states of matter (solid, liquid and gas) are all similar (the same).
-They are all made of particles
-They all have mass
-They all have volume
I took a piece of paper and rolled it up into a ball. Is this a physical change or chemical change. Explain your answer.
this is physcal because you are just changing the shape
what is the chemical symbol for Sodium
the chemical symbol for Sodium is Na
define boiling point
The temperature at which a liquid changes to a gas
Is water (H2O) an atom or a molecule? Give one reason for your answer
It is a molecule. H2O is more than two atoms that are bonded together, which forms a molecule
same one way you can know if its a chemical change
-put off of gas or smell
What it the chemical symbol for Potassium
the chemical symbol or potassium is K
define Malleability
the ability of a substance to be hammered or beaten into thin sheets
Is NaCl (salt) an element or a compound? Give a reason for your answer.
It is a compound. An element is a single pure substance; each of which are found on the Periodic Table. A compound is two or more elements together.