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Law of conservation of matter
pH scale
Random
Chemical change
elements
100
cannot be created, yet cannot be destroyed
What is MATTER
100
tastes bitter
bases
100
these three factors impact reaction time
What is concentration, surface area, temperature
100
a chemical change has taken place when their is a change in ______?
color
100
what is the symbol for hydrogen?
What is H
200
Burning of organic molecules is also known as
What is COMBUSTION
200
what is the range of the pH scale
What is 0-14
200
a group of atoms with a charge
What is a polyatomic ion
200
light and_________ are given off
What is heat
200
Fe
What is iron
300
4 Ba (NO3)2
What is Ba=4 N=8 0=24
300
taste sour
What is acids
300
always has the same properties and particles.
What is a pure substance
300
_________ are made
What is bubbles
300
Hg
What is mercury
400
2 in H2O indicates
What is 2 hydrogen atoms.
400
acids react with _______ and lose their properties
What is bases
400
appear to seperate substances
What is heterogeneus mixtures
400
difficult or impossible to
What is reverse
400
Xe
What is xenon
500
the ph scale is (each number goes up by ten)
What is logarithmic
500
the ph scale is (each number goes up by ten)
What is logarithmic
500
contains 2 or more different elements in a fixed proportion.
What is compounds
500
what were to happen if a person lit a cigarette and threw it into a toilet bowl full of chemicals?
What is an explosion, and a chemical reaction.
500
Ge
What is Germanium