What type of ions are involved in the ionic compounds discussed in this video?

• Neutral atoms

• Covalent molecules

• Polyatomic ions

• Monatomic ions

What holds the ions together in an ionic compound?

• Van der Waals forces

• Ionic bonds

• Hydrogen bonds

• Covalent bonds

Which of the following is an example of a covalent compound?

• H2O

• KBr

• CaF2

• NaCl

Tags

NGSS.MS-PS1-1

In a covalent compound, what does the chemical formula represent?

• One molecule of the substance

• The total number of atoms

• The net charge of the compound

• The simplest ratio of ions

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NGSS.MS-PS1-1

Why can't we count all the ions in an ionic crystal to write its formula?

• The charges of ions keep changing

• The ions are always moving

• Ionic compounds can be infinitely large

• Ionic crystals are too small to see

What do the subscripts in the chemical formula of an ionic compound represent?

• The charge of the ions

• The number of ions needed in the simplest ratio

• The total number of atoms

• The number of covalent bonds

What is the charge of a calcium ion in the example of calcium fluoride?

• 1-

• 2-

• 1+

• 2+

How many fluoride ions are needed to balance one calcium ion in calcium fluoride?

• One

• Two

• Three

• Four

What is the chemical formula for sodium bromide?

• NaBr

• Na2Br

• Na2Br2

• NaBr2

Tags

NGSS.MS-PS1-1

In the compound iron(II) nitride, what is the charge of the iron ion?

• 1+

• 3-

• 2+

• 3+

Tags

NGSS.MS-PS1-1