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100
Al , Cu , N , O , are all symbols for ___
What is an element
100

Melting a crayon

Physical change

100
What is arranged on the periodic table?
Elements
100
Substances in a mixture can be separated by physical means because
no chemical change has happened
100
What is happening in the chemical equation 2H2 + O2 ---> 2H2O
The compound water is being made
200
When two or more substances are mixed but not chemically combined, they form a
What is a mixture
200

Melting snow/dissolving sugar is an example of ?

A physical change

200
Na is the ____________ ______________ for sodium.
What is a chemical symbol.
200
A substance that cannot be changed into simpler substances by a chemical change is __.
an element
200
The smallest particle of any particular type of matter.
What is an atom.
300
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is–
contains 1 carbon atom and two oxygen atom.
300

how many substances join to form new chemical properties.

2 or more 

300
The number shown on the top part of each of the element squares in a periodic table is the
the atomic number
300
A substance that contains only one kind of atom is called___.
What is an element
300
What can you change in an equation when balancing both sides?
the coefficient (the number in front of the element or compound)
400
How many elements are in the compound Fe2O3?
2 elements
400

A physical change does not produce a what

a new substance

400

what doesn't change into anything new

A substance

400
Which of the following can be broken down into simple substances by chemical but not physical means?
What is a compound
400
A balance chemical equation shows that in any chemical reaction:
atoms are rearranged, not created nor destroyed
500
The smallest part of a compound that still acts like that compound is ___.
a molecule
500

Filling a bowl with different colored candies

physical change

500

Alka-seltzer and bubbles in soda are what form

A chemical change

500

The most abundant part of a solution.

What is a solvent

500
To have a balanced equation you must have:
the same amount of matter and atoms on each side of the equation.
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