Misc
Elements in IONIC bonds ________________ electrons, while elements involved in COVALENT bonds ________________ electrons.
Ionic bonds gain or lose electrons, while covalent bonds share electrons.
What is an OCTET
A full set of 8 valence electrons that an atom will try to achieve by gaining or losing electrons
How many atoms are in one molecule of the compound below NaNO3
Sodium (Na) = 1 Nitrogen (N) = 1 Oxygen (O) = 3 Total atoms = 5
Balance the following equation: P4 + O2 ----> P4O6
P4 + 3O2 -----> P4O6
What type of bond will form between Calcium (Ca) and Chlorine (Cl).
Ionic (CaCl2)
Describe how the Periodic Table can help you predict if a bond between 2 elements will be IONIC or COVALENT.
Ionic bonds occur between a metal and a non-metal, or typically between elements in columns 1 and 2 with elements in column 16 and 17. Covalent bonds occur between two non-metal elements.
Describe the Law of Conservation of Mass.
The Law of Conservation of Mass states that atoms (and their mass) cannot be created or destroyed. The number and mass of atoms must be the same on both sides of an equation.
Using the "CRISS-CROSS" method, determine the chemical formula when Sodium (Na) is bonded with Sulfur (S).
1+ 2- Na S Chemical Formula: Na2S
Balance the following equation: Al2O3 -----> Al + O2
2Al2O3 -----> 4Al + 3O2
What type of bond will form between Carbon (C) and Hydrogen (H)?
Covalent (CH4)
What is the oxidation number for Magnesium?
+2
What is an OXIDATION NUMBER, and how can we predict it using the Periodic Table?
A number that represents the charge of an ion that an atom becomes when it gains or loses electrons
What does the 3 in 3H2O represent?
The 3 is a coefficient that tells you there are 3 molecules of water present
What type of bond will form between Magnesium (Mg) and Chlorine (Cl)?
Ionic (MgCl2)
What is the oxidation number for Phosphorus?
-3
Distinguish between the terms REACTANT and PRODUCT. Provide a labeled example to support your answer.
The reactants are one or more atoms or molecules added together, and are always found on the LEFT of the yield symbol. The products are the resulting atoms and are always found on the RIGHT of the yield symbol.
Count the number of atoms in the formula below 4NaOCl2
16
What type of bond would form between gold and bromine?
What is the only thing that can be adjusted to balance a chemical equation?
Coefficients
What is the difference between an ANION and a CATION?
An anion is a negative ion and a cation is a positively-charged ion
The 2 in the formula Ag2S is called a _____________
Subscript
When does a double covalent bond form? (when two atoms do this with their electrons)
Shares 4 of their valence electrons