Chemistry Review (Chapter 2)
Use the periodic table to identify the following
Atomic #
Atomic
weight
# of protons
# electrons
Symbol
Carbon
Nitrogen
Phosphorus
Oxygen
Sulfur
Hydrogen
Chlorine
Sodium
You will find all the known elements on the periodic table look like the following image. Label the
following parts for Cl, Na and Fl.
Complete the following table by identifying the atoms, molecules and number of atoms.
# elements
# of molecules
#of atoms
H2O
4 NaOH
C6H12O6
3MnO4
5HF
Molecular formula
H2O
What elements are present
_______________
CH4
_______________________
C2H5OH
________________
Pick the best answer for the following questions
1. The positively charged particle in an atom is the
a. neutron
c. proton
b. ion
d. electron
2. Na+ and Cl- bond together to form what type of bond
a. polar
c. ionic
b. covalent
d. hydrogen
3. A chemical formula or molecular formula contains the following
a. protons and electrons
c. element type and their proportions
b. protons and neutrons
d. element type and atomic weight
4. You know that matter is anything that has mass and takes up space. Which is considered matter?
a. light bulb
c. light omitted from bulb
b. heat from bulb
d. rays from the sun