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Ionic or Covalent?
Vocabulary
Chemical Formulas
Balance Chemical Equations
Chemical Reactions
100
Elements in IONIC bonds ________________ electrons, while elements involved in COVALENT bonds ________________ electrons.
Ionic bonds gain or lose electrons, while covalent bonds share electrons.
100
What is an OCTET
A full set of 8 valence electrons that an atom will try to achieve by gaining or losing electrons
100
How many atoms are in one molecule of the compound below NaNO3
Sodium (Na) = 1 Nitrogen (N) = 1 Oxygen (O) = 3 Total atoms = 5
100
Balance the following equation: P4 + O2 ----> P4O6
P4 + 3O2 -----> P4O6
100
What 2 things can happen to heat energy during a chemical reaction?
It can be absorbed or released
200
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.
200
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.
200
Using the "CRISS-CROSS" method, determine the chemical formula when Sodium (Na) is bonded with Sulfur (S).
1+ 2- Na S Chemical Formula: Na2S
200
Balance the following equation: Al2O3 -----> Al + O2
2Al2O3 -----> 4Al + 3O2
200
Wood burning is an example of a ____________ reaction
Exothermic
300
Bond Magnesium (Mg) and Chlorine (Cl). Draw a Lewis Dot diagram to represent this bond. Is it IONIC or COVALENT?
Ionic Bond because it is between a metal and a non-metal. Chemical Formula: MgCl2
300
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
300
What does the 3 in 3H2O represent?
The 3 is a coefficient that tells you there are 3 molecules of water present
300
List the reactants and the products in this equation. What does the arrow represent? BaCl2 + H2SO4 ----> BaSO4 + HCl
Reactants: BaCl2, H2SO4 Products: BaSO4, HCl Arrow: yields
300
An ______________ reaction absorbs heat energy, making the inside of the reaction warmer, but the outside temperature cooler
Endothermic
400
Bond Carbon (C) and Hydrogen (H). Draw a Lewis Dot diagram to show this bond. Is it IONIC or COVALENT?
This is a covalent bond. Chemical Formula: CH4
400
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.
400
Count the number of atoms in the formula below 4NaOCl2
16
400
Balance the following equation: Cu2O + C --->Cu + CO2
2Cu2O + C ---> 4Cu + CO2
400
True or False: A phase change like melting, boiling, or freezing is NOT a chemical reaction
True. It is a physical process that can be reversed
500
Bond Calcium (Ca) and Chlorine (Cl). Draw a Lewis Dot diagram to show this bond. Is it ionic or covalent?
This bond is ionic. Chemical Formula: CaCl2
500
What is the difference between an ANION and a CATION?
An anion is a negative ion and a cation is a positively-charged ion
500
The 2 in the formula Ag2S is called a _____________
Subscript
500
Balance the following equation: Na + HCl -----> H2 + NaCl
2Na + 2HCl -----> H2 + 2NaCl
500
In the following equation S + Fe ----> FeS if you have 8 grams of S and want to produce 20 grams of FeS, how much Fe do you need?
12 Law of Conservation of Mass