BASIC CHEMISTRY
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Define Atomic Number and atomic weight
What is the smallest unit of life vs the smallest unit of matter?
Which subatomic particle is positive, negative or neutral?
When does an atom become an ion?
What is an isotope
What is a stable atom?
Find a periodic chart online on in a book and determine the following:
a. The atomic number and atomic weight of Magnesium (Mg), Lithium (Li) and Neon (Ne)
b. The number of protons, neutrons and electrons of Magnesium (Mg), Lithium (Li) and Neon
(Ne)
c. how many valence electrons Magnesium (Mg), Lithium (Li) and Neon (Ne) have?
8. How many electrons do each of the following atoms need in order to be stable?
Hydrogen:
Oxygen:
Nitrogen:
Carbon:
9. How many bonds will each of the following atoms form?
Hydrogen:
Oxygen:
Nitrogen:
Carbon:
10. What is an ionic bond?
11. What is a covalent bond?
12. The following are empirical formulas of small molecules or compounds. Draw the structural formulas,
showing covalent bonds, for each:
Atmospheric Hydrogen (H2)
Atmospheric Oxygen (O2)
Carbon Dioxide (CO2)
Ammonia (NH3)
Atmospheric Nitrogen (N2)
Methane (CH4)
13.. Calcium, Ca, has an atomic number of 20 and an atomic weight of 40, If Ca gave its electrons away
it would form an ion with a charge of ?_________