Particle Theory
Describe the shape of a solid? Are the particles fixed or can be changed?
The particles of a solid are fixed
What is the name of the number at the top of an element?
Atomic Number - Refers to it's order in the periodic table.
The smallest part of an element is called ...
Atom
State the element type, and how many of each atom are in the example below:
NaCl
1 Sodium
1 Chloride
2 Atoms
Is cutting a log in half a chemical or physical change? Explain Why.
Physical Change - There is no change to the chemical composition of the log.
How do the particles move in a gas? Gas particles can ______ and c_______ .
Gas particles collide and can move freely. They can expand and compress.
Every Element begins with what?
A Capital letter
When two or more atoms bond together they are called ...
Mollecules
State the element type, and how many of each atom are in the example below:
H₂O
2 Hydrogen
1 Oxygen
3 total
Is ice melting an example of a physical or chemical change? Explain Why.
Physical Change - The chemical composition does not change, regardless of its form. H2O
Describe the attraction of liquid particles. Are they stronger or weaker than Solid or Gas particles.
Liquid particles have moderate attraction. They are weaker than solid particles but stronger than gas particles.
The number at the bottom of the element represents what?
Atomic Mass - How heavy the element is.
When two or more different atoms bond together they are called ...
Compound
State the element type, and how many of each atom are in the example below:
H₂SO₄
2 Hydrogen
1 sulfer
4 Oxygen
What do we call the part that happens before the chemical reaction occurs.
Reactants
The _______ point is the temperature at which a solid turns into a liquid
Melting Point
Part of the periodic table separates metals and non-metals. There is a column in between called Metalloids. What are they?
Metalloids have the properties of a metal however are not metals.
What is the difference between a molecule and a mixture?
A molecules atoms are chemically bonded together, in a mixture, the particles are physically mixed together
3 CH₄
3 Carbons
12 Hydrogens
What does it mean for a chemical reaction to be balanced?
When the elements an atoms of the reactants are the same as the product.
The _______ _____ is the temperature at which a liquid turns into a gas
Boiling Point
DO NOT LOOK AT THE PERIODIC TABLE!!
What Element is Ne
Neon
Draw an Example on the board of a mixture including molecules and compounds
Teacher will check response
Ca₃(PO₄)₂
3 Calcium
2 Phosphorus
8 Oxygen
In class we did an experiment called the pop test. It involved adding magnesium to hydrochloric acid. What was the gas that was produced?
Hydrogen Gas (H2)