WorksheetsChemistry Review
Total questions: 77
Worksheet time: 2hrs 49mins
The correct sequence of steps to balance a chemical equation is:
Write the unbalanced equation, count atoms, add coefficients, check balance, repeat if necessary.
Write the products first, then the reactants, and add coefficients randomly.
Balance the equation by changing subscripts of compounds.
Add coefficients only to the products side until the equation looks balanced.
The term 'charges' in the context of compounds refers to:
the electrical properties of atoms or ions within the compound
the mass of the compound
the color of the compound
the temperature at which the compound reacts
The process for naming polyatomic ions involves:
Identifying the ion and using standard suffixes like -ate or -ite
Naming the ion based on the number of protons
Using only the element's symbol
Assigning random names to each ion
Acids and bases are named and have specific properties. Which of the following best describes how they are named and their properties?
Acids are named based on their anions and taste sour; bases are named based on their cations and feel slippery.
Acids are named after metals and taste bitter; bases are named after nonmetals and taste sweet.
Acids are always solid and have no taste; bases are always liquid and are odorless.
Acids and bases are both named after their color and have the same properties.
What is the term for the following definition? 'A group of atoms bonded together that acts as a single ion with an overall charge (e.g., SO42− ).'
(a)
What is the term for the following definition? 'An element (often a transition metal) that can form more than one stable ion with different charges (e.g., Fe2+ and Fe3+).'
(a)
What is the term for the following definition? 'A compound made of two or more non-metals that share electrons.'
(a)
What is the term for the following definition? 'An unbalanced chemical equation that shows the formulas of reactants and products but not the correct amounts.'
(a)
What is the term for the following definition? 'A chemical equation with the same number of each type of atom on both sides.'
(a)
What is the term for the following definition? 'The starting substance(s) in a chemical reaction (on the left side of the arrow).'
(a)
What is the term for the following definition? 'The new substance(s) formed in a chemical reaction (on the right side of the arrow).'
(a)
What is the term for the following definition? 'A solid that forms when two solutions react.'
(a)
Which type of reaction involves two or more reactants combining to make one product?
Decomposition
Single
Double
Which type of reaction involves one compound breaking down into two or more simpler substances?
Synthesis
Single displacement
Double displacement
Which type of reaction involves one element replacing another in a compound (A + BC → B + AC)?
Double displacement reaction
Synthesis
Decomposition
Which type of reaction involves two compounds exchanging parts to form two new compounds (AB + CD → AD + CB)?
Single displacement reaction
Synthesis
Decomposition
According to Bohr Rutherford, what is the maximum number of electrons in the first shell?
(a)
According to Bohr Rutherford, what is the maximum number of electrons per shell in the shells after the first one?
(a)
Refer to the Bohr-Rutherford diagram of Potassium. What is the atomic number of Potassium?
(a)
In the flowchart for naming compounds, if the first element is Hydrogen and the second part is a polyatomic ion ending in -ate, what is the ending for the acid name?
(a)
Balance the following chemical equation: 2Fe2O3 + 3C -> __Fe + __CO2 Fill in the blanks for the products.
(a)
Which law states that matter cannot be created nor destroyed, only modified?
Law of Conservation of Energy
Law of Conservation of Mass
Law of Gravity
Law of Motion
Fill in the blank: (a) is a type of matter listed in the image.
Fill in the blank: The chemical formula for Methane is (a)
Fill in the blank: The chemical formula for Propane is (a)
Fill in the blank: The chemical formula for Ozone is (a)
Fill in the blank: The chemical formula for Hydrogen Peroxide is (a)
Match the following common names with their chemical formulas:
NH3
Ammonia
CH4
Methane
C3H8
Propane
O3
Ozone
H2O2
Hydrogen Peroxide
What does a base always have?
OH (hydroxide)
H (hydrogen)
O2 (oxygen)
CO2 (carbon dioxide)
What do acids always start with, but are not attached to any oxygen?
Hydrogen
Oxygen
Nitrogen
Carbon
Non-metal with oxygen and water will become an acid.
True
False
Any metals with oxygen and water become a base.
True
False
What is acid rain and what acids are commonly found in it?
(a)
What pH value is considered neutral?
(a)
Which of the following is true about acids and bases?
0 is acidic, 14 is basic, 7 is neutral
0 is basic, 14 is acidic, 7 is neutral
0 is neutral, 7 is acidic, 14 is basic
7 is basic, 0 is neutral, 14 is acidic
What are the properties of ionic bonds?
Low melting points, poor conductivity
High melting points, conductive when dissolved
High melting points, poor conductivity
Low melting points, conductive when dissolved
How are ionic bonds formed?
Electron sharing (non-metal + non-metal)
Electron transfer (metal + non-metal)
Electron sharing (metal + non-metal)
Electron transfer (non-metal + non-metal)
Anion: (a) ions (when it gains electrons)
Cation: (a) ions (when it loses electrons)
What are the properties of covalent bonds?
High melting points, conductive when dissolved
Low melting points, poor conductivity
High melting points, poor conductivity
Low melting points, conductive when dissolved
How are covalent bonds formed?
Electron sharing (non-metal + non-metal)
Electron transfer (metal + non-metal)
Electron sharing (metal + non-metal)
Electron transfer (non-metal + non-metal)
What are physical properties?
Observable without changing the substance
Describe a substance's ability to change
Only found in liquids
Always involve a chemical reaction
Which of the following is an example of a physical property?
Reactivity
Flammability
Colour
Combustion
Which of the following is NOT an example of a chemical property?
Reactivity
Flammability
Melting point
Decomposition
Which of the following is a chemical change?
Melting
Combustion
Colour change
Density change
Chemical changes include:
A) Combustion, decomposition, synthesis and replacement
B) Melting, freezing, boiling
C) Colour, density, melting point
D) Temperature change only
Which of the following is a sign of a chemical change?
Production of light
Change in temperature
Change in form
Melting
What is the meaning of the prefix 'Mono-'?
(a)
What is the meaning of the prefix 'Bi-'?
(a)
What is the meaning of the prefix 'Tri-'?
(a)
What is the meaning of the prefix 'Tetra-'?
(a)
What is the meaning of the prefix 'Penta-'?
(a)
What is the meaning of the prefix 'Hexa-'?
(a)
What is the meaning of the prefix 'Hepta-'?
(a)
What is the meaning of the prefix 'Octa-'?
(a)
What is the meaning of the prefix 'Nona-'?
(a)
What is the meaning of the prefix 'Deca-'?
(a)
Match the prefixes to their meanings:
one
Mono
two
Bi
three
Tri
four
Tetra
five
Penta
Match the chemical symbols to their element names:
H
Hydrogen
O
Oxygen
Br
Bromine
F
Fluorine
I
Iodine
(Check ALL answers)
Mg + __HCl ---> MgCl2 + H2
Al + O2 → 2Al2O3
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
tin (II) fluoride
What is the chemical formula for the given name: manganese (vi) silicide
Mn6Si4
Mn2Si3
Mn3Si2
Mg2Si3
Name the ionic compound SnSe2
Tin diselenide
Tin (IV) Selenide
Tin selenide
Tin (II) triselenide
Name the following ionic compound: Cs2S
cesium sulfide
cesium sulfate
cesium II sulfate
cesium II sulfide
When naming ionic compounds with transition metals you need to include roman numerals to show the _____ of the metal..
atomic number
mass number
charge
ionization energy
When naming a compound, which of these is written first?
Metal
Nonmetal
Anion
Cation
When naming a compound, what must the last part be?
the element with "ide" at the end
the element with the ending "ite"
the name of the element
the element with "ide" at the end, unless its a polyatomic ion
What is the name of the compound Na2(SO4)?
Sodium sulfate
Sodium sulfide
Sodium sulfite
Sodium sulfuroxide
What is the name of the compound Sc(OH)3?
Scandium (III) hydroxide
Scandium (I) hydroxide
Scandium (II) hydroxide
Scandium hydroxide
The name of the compound Ca3(PO4)2
calcium phosphate
tricalcium diphosphate
calcium phosphorus oxide
calcium phosphide
If I gain electrons I become
Positive because I've added to my atom
negative because I've added electrons
same because i'm balanced
equal because now I have electrons
By looking at the formula of an ionic compound, we can determine the charge (oxidation state) of a transition metal.
True
False
