The Periodic Table
Who created The Periodic Table?
Dmitri Mendeleev
Molecular compounds are composed of ...
non-metals
Ionic compounds are composed of ...
at least one metal
KI
Potassium Iodide
This is the most reactive chemical family. These elements have special storage!
Alkali Metals
Rows are also called ...
Periods
True/False: CO2 is a molecular compound.
True - Both are non-metals.
True/False: Fe(HSO3)3 is an ionic compound?
True - Fe is iron (metal)
Manganese (Mn) has a 4+ charge. Sulfur (S) has a 2- charge.
How many Sulfur (S) atoms are needed to balance the compound?
2
This chemical family is the second most reactive, and contains Magnesium (Mg) and Calcium (Ca).
Alkaline Earth Metals
Chemical families are vertical. They are not rows, but ...
columns
True/False: NaCl is a molecular compound.
False - It is an ionic compound.
False - There are no metals in the formula
Litium (Li) has a 1+ change and Arsenic (As) has a 3- charge. How many Li atoms should be combined with As to balance the compound?
3
This group of elements has both metal and non-metal properties.
Metalloid
The Atomic Number of Arsenic is 33. How many protons does Arsenic have?
33
Molecular compounds _________ electrons.
Share
Ionic compounds ________ or _______ electrons.
Gain or lose
Fl5O3
Pentafluorine trioxide
This group of elements is used in lightbulbs and neon signs.
Noble Gas
The Atomic Number for Arsenic is 33. The Atomic Mass for Arsenic is 74.922. How many neutrons are in the nucleus of Arsenic?
Round to the nearest whole neutron.
42
What is the formula for Carbon tetraclouride?
CCl4
What is the formula for Potassium Iodide?
KI
P3O7
Triphosphorus heptaoxide
This chemical family has strong reactions which makes it an excellent disinfectant! One of its elements, Fluorine (Fl) is used in toothpaste.
Halogens