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8th grade Chemistry Unit One Review

AB
What is anything that has volume and mass?Matter
What are pure substances that can’t be broken down?Elements
What is a substance formed from combination of 2 or more elements?Compounds
What is the number of protons in 1 atom of an element?Atomic Number
What is the average mass of 1 atom of an element?Atomic Mass
What is the measure of the amount of matter in an object? On Earth, it's weight.Mass
what is the measure of the amount of space or area occupied by an object?Volume
What are the physical properties of matter?Mass and Volume
what is the name for the Positive charges found in the nucleus of an atom?Protons
What is the name for the Negative charges found around the nucleus of an atom?electrons
what is the name for the Neutral charges found in the nucleus of an atom?Neutrons
How do you know the number of neutrons in an atom?Atomic number (top) - Atomic Mass (bottom) in a periodic table square.
How are the elements of the periodic table similar?Each element is made of atoms that have protons, neutrons, and electrons.
How are the elements of the periodic table different from each other?Atoms of each element have a different number of protons, neutrons, and electrons.
what is the name for the small number behind an element's abbreviation? They tell you how many atoms of that element to draw.subscript
what is the name for the large number if front of the chemical formula? They tell you how many groups of atoms to draw.Coefficient
what is a large molecule made up of a chains of repeating smaller molecules?polymer
Identify an environmental issue related to synthetic polymers.Plastics are made from polymers. These aren't very biodegradable because they are made from tightly packed chains of atoms that do not break apart easily.
Identify a possible solution to synthetic polymer's environmental problem.Reduce, Reuse, Recycle of other. Which is better? Why?
What is matter made from?Atoms of the elements of the periodic table.


Mrs. L. Schmidt

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