Show:
Atomic Structure
Periodic Table
Physical/
Chemical Properties
Law of
Conservation of
Matter
Why does it matter?
100
Where are the electrons found in an atom?
In electron shells/clouds/rings on the outside of the nucleus.
100
How are elements arrange in the periodic table?
The elements are arrange in order of atomic number or number of protons.
100
What is the difference between a chemical and a physical change?
A physical change can be reversed and a chemical change cannot be reversed easily.
100
What is the simplest unit of matter?
An atom
100
What happens to the molecules of water when they change from a liquid state to a solid state?
The molecules of water slow down when it goes through a phase change from a liquid to a solid.
200
What are the three subatomic particle (small particles) that make up an atom?
Protons and Neutrons make up the nucleus of the atom and the electrons are found outside the nucleus.
200
What is the difference between a group and a period?
Groups form vertical columns and periods are horizontal rows.
200
What are three signs of a chemical change?
Color change, Formation of a gas, Temperature change, and Formation of a precipitate
200
Why do atoms bond?
To become stable and have a full octet or 8 valence electrons.
200
A bowl of chocolate M&M's is an example of what type of mixture?
Heterogeneous Mixture
300
Draw the Lewis Structure of B
A capital B surrounded by three electrons.
300
What is the most reactive group of nonmetals?
The Halogens
300
How do you know if a substance is more basic or acidic? Give an example of a strong acid reading and a strong base reading.
You use a pH test and the pH scale to figure out if a solution is more basic or acidic. A substance that is a strong acid will have a reading of below 4. A substance with a strong base reading will have a reading higher than 10.
300
Covalent bonds are formed between what kind of elements?
Nonmetals
300

Draw a before and after diagram of what happens when a sugar cube dissolves in water. Label the solute and solvent. 

solvent= water

solute= sugar

400
What subatomic particle do we use to identify an atom?
Protons
400
Why are the Noble Gases considered stable?
Each element in the Noble gases has a full outer electron shell or have at least 8 valence electrons.
400
What are three physical properties of a metal?
Conductivity, Malleability, Magnetism, and Luster
400
What kind of bond is formed when Na and Cl bond together to create table salt?
Ionic Bond
400
What term best describes the change in temperature during a chemical reaction that causes the products to become cold?
Endothermic Reaction
500
Draw the Bohr's Model for F2.
Check with teacher
500
List the following elements in order of their reactivity. Start with the most reactive and move to the least reactive. Ca , C, Br, K, He
K, Ca, Br, C, He
500
Do physical changes produce compounds or mixtures?
Mixture
500
What are two facts that will always be true about the reactants and the products of a chemical reaction that takes place in a closed space?
The number of atoms in the reactants and the number of atoms in the products are the equal. The mass of the reactants and the mass of the products are equal.
500

Find the density of an object with a volume of 8 mL and a mass of 2 grams. Would this substance float or sink in water, which has a density of 1g/mL? 

density is mass/ volume

2/8= .25

0.25 is less than 1 so it would float.