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Questions and Answers
What does the chemical formula of a compound represent?
What does the chemical formula of a compound represent?
- Physical state of the compound
- Atomic number of the elements in the compound
- Mass ratio of the elements in the compound
- Symbols and combining capacity of the elements in the compound (correct)
How can valency help determine chemical compound formation?
How can valency help determine chemical compound formation?
- By indicating the physical properties of the elements
- By revealing the mass ratio of the elements
- By stating the atomic weight of each element
- By showing how atoms of different elements combine (correct)
How is valency related to chemical bonding?
How is valency related to chemical bonding?
- Valency indicates the boiling points of elements
- Valency predicts the density of compounds
- Valency determines the color of compounds
- Valency shows the reactivity of elements (correct)
What aspect of compounds does Table 3.5 provide information about?
What aspect of compounds does Table 3.5 provide information about?
What information can be inferred from Table 3.6 about ions?
What information can be inferred from Table 3.6 about ions?
What is the correct order of writing the symbols for elements and their valencies when writing chemical formulae?
What is the correct order of writing the symbols for elements and their valencies when writing chemical formulae?
Why do we criss-cross the charges of cations and anions when writing chemical formulas?
Why do we criss-cross the charges of cations and anions when writing chemical formulas?
In magnesium chloride (MgCl2), how many chloride ions are present for each magnesium ion?
In magnesium chloride (MgCl2), how many chloride ions are present for each magnesium ion?
Why is the formula for calcium hydroxide written as Ca(OH)2 and not CaOH2?
Why is the formula for calcium hydroxide written as Ca(OH)2 and not CaOH2?
Which compound has the formula NaNO3?
Which compound has the formula NaNO3?
What does the formula Al2O3 represent?
What does the formula Al2O3 represent?
What is the correct order to write the elements in a chemical formula when a compound consists of a metal and a non-metal?
What is the correct order to write the elements in a chemical formula when a compound consists of a metal and a non-metal?
Which of the following ions is represented correctly with its symbol?
Which of the following ions is represented correctly with its symbol?
In compounds formed with polyatomic ions, what is the rule regarding enclosing the ion in a bracket?
In compounds formed with polyatomic ions, what is the rule regarding enclosing the ion in a bracket?
Which of the following compounds is a binary compound?
Which of the following compounds is a binary compound?
When writing chemical formulas, what must be ensured about the valencies or charges on the ions?
When writing chemical formulas, what must be ensured about the valencies or charges on the ions?
Which one of these elements can show more than one valency?
Which one of these elements can show more than one valency?
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