Atoms
This is the basic unit of matter. Also describes as the basic particle from which all elements are made.
What is an atom?
A group of atoms bonded together is called this.
What is a molecule?
This is anything that has mass and takes up space.
What is matter?
The Law of Conservation of Mass states this.
What is that matter cannot be created nor destroyed?
There are 118 of these organized in the Periodic Table.
What are elements?
These two subatomic particles are found in the nucleus of an atom. Their combined mass is the atomic mass of an atom.
What are protons and neutrons?
The name of this molecule is:
CO2
What is carbon dioxide?
These are the four states of matter.
What are solid, liquid, gas, and plasma?
The product of this chemical equation is:
O2 + 2H2 --> 2H2O
What is 2H2O, or water?
This is the first element on the periodic table.
What is hydrogen?
This subatomic particle has a negative charge.
What is an electron?
The subscript tells us what about this molecule:
H3
What is there are 3 hydrogen atoms?
Adding heat (thermal energy) to a substance causes the molecules to do this.
What is move faster?
The number of atoms of Ag (silver) in the reactant side of this chemical equation is:
2Ag5 + S --> 10AgS
What is 10?
This is the number of protons in the nucleus.
What is the atomic number?
A neutral atom has an equal number of these.
What are protons and electrons?
The coefficient tells us what about this chemical formula:
4H2O
What is there are 4 molecules of water?
An ice cube melting is an example of this type of change.
What is a physical change?
This is the name of this chemical reaction AND state if it is written as a balanced equation or not.
CO2 + H20 + sunlight --> C6H12O6 + O2
What is photosynthesis? and This equation is not balanced.
This is what happens to the atomic mass as you travel up the periodic table.
What is it increases?
The electron is not found in the nucleus of an atom. Name one of three words or phrases used to describe the location of an electron.
What is an orbit? or What is a cloud? or What is an outer shell?
The chemical or common name for this molecule is: NaCl
What is sodium chloride? or What is salt?
Fireworks exploding and changing color are an example of this type of change.
What is a chemical change?
Sodium plus oxygen react to form sodium oxide.
Na + O2 --> Na2O
This is how to write this as balanced equation.
What is 4Na + O2 --> 2Na2O
In the periodic table, rows (horizontal) are called periods are columns (vertical) are called this.
What are groups?