Elements
What are the three main section of the periodic table?
Metal, Metalloids, and Non-Metals
When writing an equation what is the number behind the chemical symbols?
It is called the subscript.
What is a chemical reaction?
When a substance changes its chemical composition or what it identifies chemically.
What is a physical reaction?
When a substance only changes the way it looks it keeps the same chemical composition through out.
What are the three different particles in an atom?
Protons, Electrons, and Neutrons
On an Element Square whats the Letters in the middle?
What are the first 2 steps to balancing an equation?
Write the equation, Make a RAP table.
How does chemical reaction occur?
It happens when a substance interacts with another chemically to make a new substance.
How does physical change happen?
When a substance and a material cause to make it smaller or bigger, more jagged, or soft.
What do each of the particles in an atom have as a charge?
Electrons-Negative Protons-Positive. Neutrons-No charge
How many rows and columns are on the Periodic Table?
Across 18
Down 9
What are the last three steps to balancing an equation?
Identify the elements, Count the atoms, Then Balance it.
How can a chemical reaction occur? (Examples)
With fire, air, and water, etc.
How can a physical change happen?
It can happen by cutting paper in half or slicing bread, erasing marker of a whiteboard, etc.
What is the graph of an atom called?
The Bohr Model
What is a way it happens with fire or air?
Burning wood into ash. Metal rusting due to Oxygen in the air.
How can it happen with water?
Water will get on paper but the paper is still paper it only has water in it.
What is the rings surrounding the nucleus called?
The Electron Cloud
What is a way it can happen electricly?
It can happen by it causing heat and causing something to burn.(Two wires connect to iron wool together they spark and start a fire.)
When something melts is it a physical change or chemical?
Physical Change.
What is the formula for Density, Matter, and Volume?
M/V. D times V M/D