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Questions and Answers
Which compound is correctly named according to the naming rules provided?
Which compound is correctly named according to the naming rules provided?
- Li2O is called lithium oxide (correct)
- K2O is called potassium dioxide
- MgBr2 is called magnesium dibromide
- NaCl is called sodium chloride (correct)
What is the symbol for hydrochloric acid, which contains hydrogen and chlorine?
What is the symbol for hydrochloric acid, which contains hydrogen and chlorine?
- H3Cl
- H2Cl
- HCl (correct)
- Cl2H
Which of the following is a proper representation for a gas non-metal?
Which of the following is a proper representation for a gas non-metal?
- Fe
- Cu
- O2 (correct)
- Ar
What are the correct components of the compound sodium hydroxide?
What are the correct components of the compound sodium hydroxide?
Which of the following compounds contains a non-metal that is correctly represented?
Which of the following compounds contains a non-metal that is correctly represented?
Which compound does not follow the convention of writing the metal first?
Which compound does not follow the convention of writing the metal first?
Which of the following correctly identifies the diatomic gas non-metal?
Which of the following correctly identifies the diatomic gas non-metal?
Which compound would be named lithium phosphide following the naming rules?
Which compound would be named lithium phosphide following the naming rules?
What is the correct formula for sodium hydroxide?
What is the correct formula for sodium hydroxide?
Which of the following compounds contains a carbonate?
Which of the following compounds contains a carbonate?
What is the diatomic form of nitrogen?
What is the diatomic form of nitrogen?
What is the name of the compound with the formula CuCO3?
What is the name of the compound with the formula CuCO3?
Which of the following is a solid non-metal found as an element?
Which of the following is a solid non-metal found as an element?
What is the proper naming convention for Li2O?
What is the proper naming convention for Li2O?
What is the formula for ammonia?
What is the formula for ammonia?
Which of the following states that metals are found as elements?
Which of the following states that metals are found as elements?
What is the word equation for the reaction between lithium and bromine?
What is the word equation for the reaction between lithium and bromine?
Which of the following represents the correct word equation for the reaction of sulfur with oxygen?
Which of the following represents the correct word equation for the reaction of sulfur with oxygen?
What is produced when potassium reacts with water?
What is produced when potassium reacts with water?
Which of the following describes the reaction between sodium bromide and chlorine?
Which of the following describes the reaction between sodium bromide and chlorine?
What is the name given to the ion represented by the formula NO3?
What is the name given to the ion represented by the formula NO3?
Which of the following statements about balancing chemical equations is true?
Which of the following statements about balancing chemical equations is true?
When balancing the equation H2 + O2 → H2O, how many molecules of water are produced?
When balancing the equation H2 + O2 → H2O, how many molecules of water are produced?
What is the word equation for mixing chocolate and milk to make hot chocolate?
What is the word equation for mixing chocolate and milk to make hot chocolate?
What is the main principle behind the conservation of mass during chemical reactions?
What is the main principle behind the conservation of mass during chemical reactions?
What are the inputs of a chemical reaction known as?
What are the inputs of a chemical reaction known as?
What is the correct word equation for the reaction between hydrochloric acid and magnesium oxide?
What is the correct word equation for the reaction between hydrochloric acid and magnesium oxide?
What distinguishes an element from a compound?
What distinguishes an element from a compound?
In the chemical formula H2O, what does the '2' represent?
In the chemical formula H2O, what does the '2' represent?
Which statement is true regarding balancing chemical equations?
Which statement is true regarding balancing chemical equations?
What aspect of mass is measured when discussing conservation of mass in chemical reactions?
What aspect of mass is measured when discussing conservation of mass in chemical reactions?
Which chemical reaction is correctly represented by the symbol equation Na + O2 → Na2O?
Which chemical reaction is correctly represented by the symbol equation Na + O2 → Na2O?
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Study Notes
Periodic Table and Chemical Reactions
- Metals are typically located on the left side of the periodic table, while non-metals are found on the right side.
- Chemical equations can be expressed as word equations or symbol equations.
Naming Compounds
- Compounds comprising a metal and a non-metal are named by writing the metal first followed by the non-metal ending in "ide".
- Examples:
- Li + O2 → Li2O (lithium oxide)
- Na + Cl → NaCl (sodium chloride)
- Special names for common compound parts:
- Sodium hydroxide = NaOH
- Copper carbonate = CuCO3
- Hydroxide = OH, Sulfate = SO4, Nitrate = NO3, Carbonate = CO3
Element Symbols
- Metals show as elements: Li (Lithium), Fe (Iron), Au (Gold).
- Solid non-metals represented as elements: C (Carbon), P (Phosphorus), I (Iodine), S (Sulfur).
- Gaseous non-metals are typically diatomic: H2 (Hydrogen), O2 (Oxygen), N2 (Nitrogen), Cl2 (Chlorine), etc.
- Notable compounds:
- Hydroxide (OH), Methane (CH4), Ammonia (NH3).
Chemical Reaction Practice
- Example word equations:
- Lithium + Bromine → Lithium Bromide
- Sulfur + Oxygen → Sulfur Dioxide
- Potassium + Water → Potassium Hydroxide + Hydrogen
Conservation of Mass
- The principle states that mass cannot change during a chemical reaction; it remains constant.
- Reactants are substances that undergo change, while products are the resulting substances after the reaction.
- No atoms are created or destroyed in a chemical reaction; only their bonding changes.
Balancing Chemical Equations
- Balancing involves ensuring the same number of each type of atom on both sides of the reaction.
- The subscript indicates the number of atoms of that element, whereas a coefficient applies to all elements in that compound.
Example Chemical Formulas
- HO: 1 Hydrogen atom, 1 Oxygen atom.
- CO: 1 Carbon atom, 1 Oxygen atom.
- H2O: 2 Hydrogen atoms, 1 Oxygen atom.
Success Criteria
- Ability to combine symbols appropriately to form compounds.
- Capability to convert word equations into symbol equations.
- Understanding the concept of balancing symbol equations in chemical reactions.
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