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100
What is anything that has mass and takes up space?
Matter
100
What are two properties of matter?
Chemical and Physical
100
What is matter that can be observed without changing the substance
Physical matter
100
What is a substance that can’t be seperated into simpler substance by chemical reactions
Element
100
How many known elements are there?
111
200
What is the smallest unit of an element that has the chemical properties of that element
Atom
200
What charge does a proton have?
Positive
200
What charge does an electron have?
Negative
200
What charge does a neutron have?
Neutral
200
Where is the nucleus located?
In the center of an atom
300
What forms the nucleus?
The protons and neutrons
300
Where are electrons found?
Around the nucleus
300
What does the atomic number represent?
The number of protons in an element
300
What does the mass number represent?
The number of protons + neutrons in an atom
300
What is the atomic mass
The actual mass of an atom
400
What is an atom with the same number of protons but different number of neutrons
Isotope
400
What is the periodic table used for?
To organize elements
400
What is the smallest unit of a compound that has the chemical properties of that compound?
Molecule
400
What is a molecule made up of only one type of element?
Diatomic molecule
400
What is a group of letters and numbers that describe a compound?
Chemical formula
500
What do the letters in a chemical formula represent?
Symbols on the periodic table that represent each element
500
What do the numbers in a chemical formula represent?
How many atoms of an element are in a molecule of a compound
500
What is it called when atoms combine to form a new substance
Chemical reaction
500
Which side of the arrow in a chemical reaction are the reactants on?
The left side
500
Which side of the arrow in a chemical reaction are the products on?
The right side