Unit 3 Lesson 14 Science
Write the chemical formula of the ionic compound magnesium chloride. If your answer contains subscripts, list the number with one underscore in front of it. (Example: Write H2O as H_2O.) Hint: Use the steps to determine the ions, and remember to use the crossover rule.
MgCl2 (MgCl_2)
Write the chemical formula of the ionic compound sodium oxide. If your answer contains subscripts, list the number with one underscore in front of it. (Example: Write H2O as H_2O.) Hint: Use the steps to determine the ions, and remember to use the crossover rule.
Na2Cl (Na_2Cl)
Which answer choice is an example of a correct chemical name? aluminum oxide
Which answer choice is an example of a correct chemical name? aluminum oxide
Write the chemical name of the covalent compound PF3. phosphorus trifluoride
Write the chemical name of the covalent compound PF3. phosphorus trifluoride
Write the chemical name of the ionic compound CaS.
calcium sulfide
Write the chemical name of the covalent compound CCl4.
carbon tetrachloride
Chemical Formula
(noun) a shorthand notation including letters and numbers that identifies the atoms of elements within a compound
Molecular Formula
(noun) a shorthand notation that provides the number of atoms present in one molecule of a covalent compound
Chemical Name
(noun) identifying label that denotes the chemical composition of a compound
In the writing of molecular formulas for covalent compounds, how is more than one atom of an element indicated?
A subscript of the number of atoms is added after that element.
Which answer choice is an example of a correct chemical formula?
Al2O3
Write the chemical name of the ionic compound KCl.
potassium chloride
In the writing of ionic chemical formulas, what factor is "crossed over" in the crossover rule?
the value of each ion's charge
How many ions of chlorine (Cl) are needed to balance out one ion of calcium (Ca)? Hint: Look at your periodic table and the steps for writing ionic chemical formulas.
two ions of chlorine
