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Combinations of Matter
Properties of Matter I
Properties of Matter II
Atomic Structure
Density and Percent Error
100
This consists of two or more substances that are not chemically combined
What is a mixture?
100
The physical state of a substance
What is phase?
100
Those properties that can be determined without changing the chemical makeup of a substance
What are physical properties?
100
The smallest sample of an element
What is an atom?
100

What is the formula for density?

Density = Mass/Volume

200
A kind of mixture that is the same throughout
What is a homogeneous mixture?
200
The physical state of a substance in which volume and shape are fixed
What is a solid?
200
The kind of change in which no new substances are formed
What is a physical change?
200
The subatomic particle that has a positive charge
What is a proton?
200

What is the formula for percent error?

|(New - Old)/Old| x 100

300
A kind of mixture that is not the same throughout
What is a heterogeneous mixture?
300
The physical of a substance in which volume is fixed but shape is not
What is liquid?
300
Those properties that can be determined only by changing the chemical makeup of a substance
What are chemical properties?
300
The subatomic particle that has a negative charge
What is an electron?
300

A student has a metal sample that has a mass of 10 g and volume of 2 cm3. What is the density of the sample?

5 g/cm3

400
Of the following, the one that is homogeneous: salt water, fresh water, or fruit salad
What is salt water?
400
The physical state of a substance in which neither shape nor volume are fixed
What is a gas?
400
The kind of change in which one or more new substances are formed
What is a chemical change?
400
The subatomic particle that has no charge
What is a neutron?
400

A student is trying to find the mass of a sample whose density is 4 g/cm3 and takes up 4 cm3 of space. What is the mass?

16 g

500
Of the following, the one that is a heterogeneous mixture: salt water, fresh water, fruit salad
What is fruit salad?
500

What is the term for liquid becoming a gas?

What is a vaporization?

500
Of the following, the one that is a chemical change: cutting down a tree, crushing a soda can, burning a pile of leaves, or breaking a glass
What is burning a pile of leaves?
500
The central portion of the atom that contains the protons and neutrons
What is the nucleus?
500

A student took a 20 g substance and tried to measure the mass. When he placed it on the scale, it read 19 g. What is the student's percent error?

5%