Chemical bonding test review

An atom or group of atoms that have gained or lost electrons; positive or negative charge
What is an ion
the force that holds atoms or ions together is called a__
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The anion of chlorine ionis called a chloride ion. What is the name of a Fluorine ion?Bromine?Oxygen?phosphorus?
Valence electrons
What part of the atom is responsible for an atom’s chemical reactivity?
To have a full outer shell like a noble gas
Why do atoms gain, lose or share electrons?
A transfer of electrons forming OPPOSITELY CHARGED particles that are pulled together by an
electrostatic attraction; metals and nonmetals AND polyatomic ions
What is an ionic bond formed? What types of elements participate in ionic bonding?
Name the metal first, change the non-metal to an -ide ending
How are ionic compounds containing only a metal and a non-metal named?
Transition metals that form more than one ion need to be identified, THE ROMAN NUMERAL IS THE
CHARGE (ionization number) on the transition metal ion
Why do ionic compounds containing transition metals require Roman Numerals in their names?
What does the Roman Numeral stand for?
A group of covalently bonded nonmetal atoms that gain or
What is a polyatomic ion? How does it behave?
A chemical bond formed when atoms SHARE electrons, non-metals
What is a covalent bond? What types of elements participate in covalent bonding?
What type of bond holds together a polyatomic ion?
The bond between the oxygen and hydrogen (non-metals) in the polyatomic ion is
covalent but the bond between the Ca+2 ion and the (OH)-1 ions is ionic
Explain how a calcium hydroxide, Ca(OH)2 can contain both ionic and covalent bonds.
A bond between positively charged metal ions in a pure metal crystal or an alloy and the electrons around
A “sea of electrons” ; conductivity, luster, ductile, malleable – due to “loose” nature of the electrons
What is a metallic bond? How can it be described? How does the metallic bond describe
the properties of metals?
Ionic Ionic Covalent Covalent Metallic.Ionic bonds are formed between metal and nonmetal ions OR polyatomic ions;
Covalent bonds are formed between non-metals in compounds OR in polyatomic ions
Metallic bonds are formed between metal atoms
Which of the following are most likely ionic bonds? Covalent? Explain.
MgO SrCl2 CO2 CH4O Mg
Metals conduct electricity because of the “sea of electrons” surrounding the metal ions. K(OH) will only
conduct electricity only when dissolved in water because it breaks into charged particles K+1 and (OH)-1.
Charged particles such as electrons or ions conduct electricity As an ionic solid, it will not conduct
electricity because there are no charged particles or moving electrons.
Which TWO of the following will conduct electricity? Explain.
Aluminum foil sugar, C6H12O11 dissolved in water potassium hydroxide, K(OH), dissolved in water
Yes, a silver coin can conduct electricity. A silver coin consists of metal atoms that are held together
by metallic bonds – the “sea of electrons” surrounding the metal ions allow the current to be passed
through it
Can a silver coin conduct electricity? What type of bonds are in a silver coin?
MnO2 and Mn2O7 contain
different forms of the manganese ion. In MnO2, the manganese ion has a +4 charge to balance the two
oxide ions, each with a -2 charge and the name is manganese IV oxide. In Mn2O7, there are 7 oxygen
atoms, each with a -2 charge for a total of -14. There are only 2 manganese ions, so in order to
balance the -14, each manganese has to be a +7. The name of this compound is manganese VI oxide.
Explain the difference between MnO2 and Mn2O7 and name each compound
The total charge of the compound must be zero. Each of the two cyanide ions has a charge of -1. The
charge of the single cadmium ion must be +2 to balance the overall -2 charge of the cyanide ions.
Cadmium cyanide, Cd(CN)2 is a compound used in electroplating. What is the charge of the cadmium cation?
Explain your reasoning.
Copper metal contains metallic bonds. The characteristic “sea of electrons” surrounding the metal ions
allows the current to be carried through the metal. Ionic compounds when in solid form do not conduct
electricity. Copper sulfide will conduct electricity only when dissolved in water. The properties of
metals, such as malleability, ductility and conductivity, make them a good choice for electrical wiring.
Ionic solids are brittle and would have to be dissolved in water to conduct electricity, making them a
poor choice for electrical wiring.
Compare the metallic bonds of copper with the ionic bonds of copper sulfide to explain why metals rather than
ionic solids are used in electrical wiring.
Carbon monoxide and carbon dioxide are both
sharing electrons in a covalent bond.
Describe the difference between CO and CO2. Name each.

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