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Chemistry Test 1

By Margot Lamie

Can elements be separated into simpler substances? No. Elements always stay as they are.
What are compounds made up of? Two or more elements.
Can a compound be separated chemically or physically? A compound can only be separated chemically. A compound has a chemical formula and it always made in a specific ratio.
What is a mixture made up of? Two or more substances.
Can a mixture be separated physically or chemically? A mixture can be separated physically and has no chemical change.
What is a heterogeneous mixture? In a heterogeneous mixture, you can see all the parts. A heterogeneous mixture is not completely combined. ex. italian dressing, chocolate chip pancakes
What is a homogeneous mixture? In a homogeneous mixture, you cannot see all the parts. A homogeneous mixture is completely mixed and appears the same throughout. ex. saltwater, baked cake
What is a physical change? happens when matter changes size, shape, or form ex. water boiling (liquid to gas)
What is a chemical change? any change that results in the creation of a new chemical substance
What is density? mass/volume substances that are denser contain more matter in a certain volume
What is an example of density? Lead is very dense while aluminium is not
What is an example of a chemical change? baking soda and vinegar reacting to create foam
What is matter? anything that has mass and takes up space
What is an atom? an atom is composed of matter; the smallest part of an element
What are protons, electrons and neutrons? protons: positively charged particles within the atom neutrons: neutrally charged particles within the atom electrons: negatively charged particles within the atom
Created by: margotlamie07