Ionic Compounds – Flashcards
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What type of bond results when one or more valence electrons are transferred from one atom to another?
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An ionic bond.
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An ionic compound is formed when there is a reaction between
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A metal and a nonmetal or polyatomic ions
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A negative ion
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gains electrons and its radius gets larger
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A positive ion
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loses electrons and its radius gets smaller
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Which type of substance can conduct electricity in the liquid phase but NOT in the solid phase?
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An ionic compound.
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Which statement best describes the substance that results when electrons are transferred from a metal to a nonmetal?
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It contains ionic bonds and has a high melting point.
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The crystal of potassium chloride is composed of
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Potassium ions and chlorine ions
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Which kind of compound generally results when nonmetal atoms chemically combine with metal atoms?
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Ionic compound.
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Which formula represents an ionic compound?
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NaCl
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What is the chemical formula for calcium chloride?
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CaCl2
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Which substance contains bonds that involved the transfer of electrons from one atom to another?
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KBr
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What is the chemical formula of sodium sulfate?
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Na2SO4
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Which element reacts with oxygen to form ionic bonds?
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Calcium
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Which element forms an ionic compound when it reacts with lithium?
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Bromine
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Polar covalent bond
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A covalent bond in which the two atoms have different electronegativities, causing a separation of charges.
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Nonpolar covalent pond
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A covalent bond in which the two atoms have identical or very similar electronegativities, so that the charges are distributed evenly.
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Why do ionic bonds conduct electricity when dissolved in water?
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When ionic substances dissolve in water, the substance breaks down into ions. Ions being charged particles, can cause a current to flow.
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Why do ionic substances have hard surfaces?
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Ionic substances attract each other strongly because of their opposite charge.
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What are the physical properties of metals?
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1. High melting points
2. High boiling points
3. Ductile
4. Malleable
5. Conduct electricity as solids and liquids
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A covalent bond is formed when there is a reaction between
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A nonmetal and a nonmetal. Also, the sharing of valence electrons to satisfy the octet rule.
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When a bond is broken energy is
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Absorbed
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When a bond is made energy is
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Released
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Molecular compounds are
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Covalent bounding
