Important Words
The study of the composition, properties, and changes of matter
What is chemistry?
Name the three states of matter
What are solids, liquids, and gases?
Give an example of a physical change
*
Vegetable oil is ______ dense than water
Less
Name a characteristic of an acid
Sour, sticky, pH < 7, corrosive, etc.
The basic unit of matter/the smallest unit of matter that can have the properties of an element
What is an atom?
This type of matter has definite volume, and definite shape
What is a solid?
Ice melting is an example of what kind of change?
What is a physical change?
The measure of how compact (closely packed together) matter is
What is density?
Name a characteristic of a base
A measure of the amount of stuff an object is made of
This type of matter has no definite shape, and no definite volume
What is a gas?
A change in which the form of a substance is altered, but it is not transformed into a new substance
What is a physical change?
The difference in electrical charges within a molecule
What is polarity?
The measure (a number) that tells us how acidic or basic something is
What is pH?
A particle made of two or more atoms bonded together
What is a molecule?
The process of going from a solid to a liquid is called
What is melting?
Baking a cake is an example of this kind of change
What is a chemical change?
Electronegativity refers to the ability of an atom to attract this
What are electrons?
A technique used to separate different parts of a chemical mixture
What is chromatography?
A type of atom with a unique number of protons; they cannot be broken down by chemical reaction
What is an element?
The process of going from a gas to a liquid is called
What is condensation?
Chemiluminescence is a reaction that produces _____ without producing _____
Chemiluminescence is a reaction that produces light without producing heat
Cohesion is the attraction of ______ molecules that cause them to stick together, while adhesion is the attraction of _____ molecules that cause them to stick to together.
Similar/like/same; different/unlike
An emulsifier does this
Allows immiscible substances to mix