Matter
This is anything that has mass and takes up space.
What is matter?
The smallest unit of matter.
What is an atom?
Rows on the periodic table are called this.
What are periods?
A change that does NOT create a new substance.
What is a physical change?
Substances present BEFORE a reaction.
What are reactants?
A pure substance made of only one kind of atom.
What is an element?
These particles are positive and found in the nucleus.
What are protons?
Columns on the periodic table are called this.
What are groups?
A change that DOES create a new substance.
What is a chemical change?
Substances formed AFTER a reaction.
What are products?
A substance made of two or more elements chemically bonded.
What is a compound?
These particles have no charge.
What are neutrons?
These elements are shiny, good conductors, and malleable.
What are metals?
Name one sign of a chemical change.
What is color change, gas production, temperature change, odor, light, or precipitate?
This is the definition of Law of Conservation of Mass.
matter cannot be created or destroyed.
A mixture that is NOT evenly distributed
What is a heterogeneous mixture?
This number equals the number of protons (and electrons).
What is atomic number?
These elements are dull, brittle, and poor conductors.
What are nonmetals?
Cutting paper is an example of this type of change.
What is a physical change?
What must be equal on both sides of a balanced equation?
What is the number of atoms of each element?
Name one way mixtures can be separated.
What is filtration, sifting, or evaporation?
If an atom has atomic mass 16 and atomic number 8, how many neutrons?
What is 8 neutrons?
These elements have properties of both metals and nonmetals.
What are metalloids?
Burning wood is an example of this type of change.
What is a chemical change?
In this system, matter cannot enter or leave.
What is a closed system?