H.Chem- Lesson- Naming and writing Ionic compounds

Multiple Choice

Which of the following best describes a formula unit in an ionic compound?

• The smallest repeating unit of a crystal lattice that shows the simplest ratio of cations and anions.

• A molecule containing only covalent bonds.

• A group of atoms bonded together by shared electrons.

• A single atom with a positive or negative charge.

Open Ended

Why is it important to understand how to name and write chemical formulas for ionic compounds?

Open Ended

Explain why polyatomic ions such as NH4+ and SO4^2- are important in chemistry. Provide examples of where they might be found or used.

Multiple Choice

Which of the following best describes a cation?

• A positive ion that has lost one or more electrons

• A negative ion that has gained one or more electrons

• A neutral atom

• A molecule with no charge

Open Ended

Compare the ionic charges formed by elements in Group 1 and Group 2 of the periodic table. How do their valence electrons relate to the charges they form?

Multiple Choice

Which of the following ions is formed by losing three electrons?

• Al3+

• Na+

• Mg2+

• Cl-

Multiple Select

Which of the following ions can be formed by elements in Group 14 (4A)?

• +2

• -4

• +3

• -1

Fill in the Blank

Fill in the blank: Group 15 elements gain ___ electrons to form -3 ions.

Multiple Choice

Which group in the periodic table tends to gain 2 electrons to form -2 ions?

• Group 15 (5A)

• Group 16 (6A)

• Group 17 (7A)

• Group 18 (8A)

Open Ended

Compare the ionic charges formed by elements in Group 16 (6A) and Group 17 (7A). What trend do you observe?

Multiple Choice

Fill in the blank: Stable noble gases in Group 18 (8A) do not form ions.

• true

• false

Multiple Choice

Which of the following statements about transition elements (Groups 3-12) is correct?

• All transition elements have only one possible oxidation state.

• Many transition elements have more than one possible oxidation state.

• Transition elements do not form ions.

• Transition elements always form +1 ions.

Multiple Select

Select all correct statements about the oxidation states of transition elements.

• Copper can have more than one oxidation state.

• Zinc always forms Zn2+ ions.

• Silver always forms Ag2+ ions.

• Some transition elements have only one possible oxidation state.

Open Ended

Explain why metals tend to form cations and nonmetals tend to form anions, based on their behavior with electrons.

Multiple Choice

Which of the following best describes an ionic bond?

• A bond formed by sharing electrons between atoms

• A strong electrostatic force holding oppositely charged ions together in a compound

• A weak attraction between neutral atoms

• A force that holds molecules together

Multiple Choice

What is the difference between a binary compound and a ternary compound?

• Binary compounds contain two elements, while ternary compounds contain more than two elements.

• Binary compounds contain metals only, while ternary compounds contain nonmetals only.

• Binary compounds are always ionic, while ternary compounds are always covalent.

• Binary compounds are gases, while ternary compounds are solids.

Multiple Choice

How are monatomic ions different from polyatomic ions?

• Monatomic ions are made of one atom, while polyatomic ions are made of two or more atoms.

• Monatomic ions are always positive, while polyatomic ions are always negative.

• Monatomic ions are found only in metals, while polyatomic ions are found only in nonmetals.

• Monatomic ions are neutral, while polyatomic ions are charged.

Multiple Select

Check all that apply for the rules when naming an ionic compound.

• cation comes first

• cation come second

• anion comes first

• anion comes second

Open Ended

Explain the process of naming a binary ionic compound, using NaCl as an example.

Multiple Choice

Name the compound CaS.

• calcium sulfide

• calcium sulfate

• calcium sulfur

• calcium silicate

Multiple Choice

Which of the following statements best explains why CaCl2 is considered a binary compound, even though it contains two chlorine atoms?

• Because it contains only two different elements.

• Because it has two chlorine atoms.

• Because it is made of ions.

• Because it is a compound with a subscript.

Multiple Choice

Name the compound with the formula Mg3P2.

• magnesium phosphide

• magnesium phosphate

• magnesium phosphite

• magnesium peroxide

Multiple Choice

Based on the diagrams, how many valence electrons does aluminum have and how many does sulfur have?

• Aluminum has 3, sulfur has 6

• Aluminum has 2, sulfur has 8

• Aluminum has 6, sulfur has 3

• Aluminum has 8, sulfur has 2

Drag and Drop

Atoms from compounds to

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and ​

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Drag these tiles and drop them in the correct blank above

gain stability

decrease potential energy

lose stability 

increase potential energy

Match

Match the following to form true statements:

• When solid, ionic compounds

• When melted ionic compounds

• Ionic compounds have

• There are many strong bonds

• Elements in group 1 of the periodic table form ions

cannot conduct electricity

can conduct electricity

high melting and high boiling points

between ions in an ionic compound.

with a charge of 1+

• cannot conduct electricity

• can conduct electricity

• high melting and high boiling points

• between ions in an ionic compound.

• with a charge of 1+

Multiple Choice

Which of the following best describes what happens when Al and S form an ionic compound, according to the diagrams?

• All ions achieve a complete outer energy level by transferring electrons.

• Aluminum loses electrons and sulfur gains protons.

• Sulfur loses electrons and aluminum gains electrons.

• No electrons are transferred between atoms.

Fill in the Blank

Fill in the blank: The small number to the lower right of a chemical symbol in a formula is called a ___.

Multiple Choice

Using the model, write the chemical formula for an ionic compound that has Mg and Cl.

• MgCl₂

• Mg₂Cl₂

• Mg₊₂Cl_-1

• Mg₂Cl₂

Match

Match each compound with its correct name:

• CaBr₂

• LiF

• LiBr

• CaF₂

• LiCl

calcium bromide

lithium fluoride

lithium bromide

calcium fluoride

lithium chloride

• calcium bromide

• lithium fluoride

• lithium bromide

• calcium fluoride

• lithium chloride

Match

Match the following

• AlP

• Ba(CN)₂

• Rb₂O

• Ca₃P₂

• BaSO₄

Aluminum phosphide

Barium cyanide

Rubidium oxide

Calcium phosphide

Barium sulfate

• Aluminum phosphide

• Barium cyanide

• Rubidium oxide

• Calcium phosphide

• Barium sulfate