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 names, and how many of each atom are in the example below:
NaCl
1 Sodium
1 Chloride
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.
Unlike solids, gas particles can e______ and c_______ .
Unlike solids, gas particles can expand and compress
Every Element symbol begins with what?
A Capital letter
When two or more different elements bond together they form ______________
Compounds
State the element names, and how many of each atom are in the example below:
H₂O
2 Hydrogen
1 Oxygen
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 particles?
Liquid particles have a weaker than solid particles.
The number at the bottom of the element represents what?
Atomic Mass - How heavy the element is.
The 3 types of subatomic particles are p________ , n______________ and e____________.
State the element names, and how many of each atom are in the example below:
H₂SO₄
2 Hydrogen
1 sulfer
4 Oxygen
Fireworks are chemical change - new light is created as the new products are formed. They also cannot be reversed.
The _______ point is the temperature at which a solid turns into a liquid
Melting Point
The columns of the periodic table are called _____
Groups
What is the difference between a compound and a mixture?
Atoms in a compound are chemically bonded together, in a mixture, the particles are physically mixed together
State the element names, and how many of each atom are in the example below:
CH3COOH
2 Carbons
4 Hydrogens
2 Oxygens
Describe a physical change that has not yet been discussed in class.
Teacher to check
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 that includes both elements and compounds.
Teacher will check response
State the element names, and how many of each atom are in the example below:
Ca₃(PO₄)₂
3 Calcium
2 Phosphorus
8 Oxygen
Describe a chemical change that has not yet been discussed in class.
Teacher to check.