Ionic Bonding

What is true about ionic compounds

• Its made of charged atoms but it is neutral

• Its chemical formula makes a molecule

• formula unit give the number of ions in a crystal

• chemical formula gives number of ions in a molecule

Which of the following occurs in an ionic bond

• two atoms share electrons

• oppositely charged ions attract

• like-charged ions attract

• a sea of electrons bound positive nuclei together

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What is the formula for sodium nitride

• Na₂N

• NaN₃

• NaN

• Na₃N

Under what conditions do ionic compounds conduct electricity?

• only when they are in crystal form

• only when melted

• only when melted or dissolved in water

• only when dissolved

What is the formula for potasium K⁺ phosphate PO₄^3-

• KPO₄

• K₄PO₃

• K₃PO₄

• K(PO₄)₃

What do we call electrons in the highest energy level of an atom?

• orbital electrons

• cations

• anions

• valence electrons

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Most ionic compounds

• are crystalline solids at room temperature

• conduct electricity in the solid state

• have low melting points

• are made of two nonmetal elements

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Which of the following elements will form an ion with a -1 charge?

• sodium

• potasium

• flourine

• helium

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A charged group of atoms that behave as a single unit

• covalent compounds

• molecular compounds

• polyatomic ions

• a molecule

What is the charge on a magnesium ion?

• 1-

• 2-

• 1+

• 2+

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