Any substance that has a defined composition and properties.
What is a chemical
100
The amount of matter in a substance.
What is mass?
100
The smallest unit of an element that maintains the physical and chemical properties of that element.
What is an atom?
100
The number of carbon atoms in the compound C9H8O4
What is 9?
100
The conversion factor between hours and minutes.
What is 60 minutes = 1 hour
200
The process by which one or more substances change to produce one or more new substances
What is a chemical reaction
200
The physical property defined as mass divided by volume (m / v).
What is density?
200
A sample of matter with definite chemical and physical properties that don't change regardless of the sample size.
What is a pure substance?
200
Examples include sweet tea and 14-karat gold.
What is a homogeneous mixture?
200
This prefix means "one million."
What is mega?
300
Solid, liquid or gas
What is state of matter?
300
The five SI units of measurement for length, temperature, mass, energy and amount of a substance.
What are meter, Kelvin, kilogram, joule, and mole?
300
A pure substance made up of two or more types of atoms chemically joined.
What is a compound?
300
The two main ways we might separate mixtures in a lab.
What are filtration and distillation?
300
This prefix means "one thousandth (1 / 1000)"
What is milli?
400
Changes in matter where the identity of the substance does not change but the arrangement, location and speed of its particles does change.
What is physical change?
400
Characteristics of a substance that do not involve chemical change, such as density, color and hardness.
What are physical properties?
400
The different forms a single element can take, for instance, O3, O2 and O.
What is an allotrope?
400
The two broad groups that we can divide all matter into.
What are pure substances and mixtures?
400
The number of cubic centimeters in one liter.
What is 1000 cm3?
500
The substances that participate in a chemical reaction.
What are reactants?
500
The reactants in the chemical equation
Iron oxide + aluminum --> iron + aluminum oxide
What are iron oxide and aluminum?
500
A mixture where different substances occur in various proportions, are physically mixed, and which has properties that reflect the component substances.
What is heterogeneous mixture?
500
All pure substances are divided into these two groups.
What are elements and compounds?
500
The density of copper, in g / cm3, if 9 kg of copper has a volume of 1000 cm3.