Chemistry Test, Monday, November 18, 2013

Review the following material:
     1. Chemistry Packet
     2. Lab activities and questions
     3. The Nature of Matter: Chapters 1, 2, and 4
     4. Chemistry: Chapter 1, Chapter 2 - Section 1, Chapter 3 - Sections 1 and 2
     5. Chemistry Review Sheet

Review slideshow Q & A:

What is the electrical charge of each sub-atomic particle?

Protons +
Electrons –
Neutrons 0

How many electrons does carbon have? How many in its outer energy level?

6 and 4

If an atom of sodium loses its outer shell electron, what does it become?

A positive ion

At which energy level do electrons have the least energy?  …the most energy?

Least closest to the nucleus; greatest in the outer shell

One molecule of H2O has what atomic mass?

18 AMU

How many atoms in a molecule of aspartame, C13H16N2O5

36 atoms

What neutral particle is formed when atoms share electrons?

A molecule

How many atoms of oxygen are in a molecule of calcium phosphate,  Ca3(PO4)2?

8 atoms

What types of chemical bonds between atoms can form molecules of a new substance?

Covalent Bonds
Ionic Bonds

What does the subscript represent in a chemical formula?

The number of atoms of a specific element in a compound

What are the characteristics of a mixture?

Each component of a mixture retains its original properties

Is salt and water a mixture or a compound?

A homogeneous mixture

What is a solution of copper and zinc called?

An alloy, brass

In a solution of salt water, which is the solvent and which is the solute?

Water is the solvent and salt is the solute

A solution that contains all the solute it can hold is called what?

Saturated

What is conservation of mass in a chemical reaction?

The mass of the reactants and the products are equal.

Is this chemical equation balanced?
4Na + O2 ð 2Na2O

yes

What are 3 indications of a chemical reaction?

Heat and/or light
formation of gas
change in color

What do all chemical reactions require?

Energy

Does a chemical reaction occur when salt water evaporates?

No, evaporation is a physical change

Dot diagrams are used to represent what?

Outer shell electrons

What is the name given to elements in Group 18?

Noble Gases

If you increase the amount of salt in a saline solution, you have increased its __________?

Concentration

What are common gas-gas
liquid-gas
and
solid-solid
solutions?

Air: gas-gas
 Coke: liquid-gas
Brass: solid-solid

What common compound is held together with a covalent bond?
… an ionic bond?

H20 is covalent
NaCl is ionic