Term
Atoms bond together through their:
A. electrons
B. neutrons
C. protons
D. neucleons
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Definition
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Term
•Electrons behave as though they are contained within a series of ______ concentric shells.
A.8
B.7
C.18
D. 2
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Definition
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Term
In order, the maximum number of electrons each shell can hold is:
A. 2, 2, 8, 8, 18, 22, 32
B. 2, 8, 18, 18, 32, 32, 36
C. 2, 8, 8, 18, 18, 32, 32
D. 2, 8, 8, 18, 32, 32, 36 |
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Definition
| C. 2, 8, 8, 18, 18, 32, 32 |
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Term
Electrons in the outermost shell of an atom are called ____ and are able to participate in ______.
A. Outer Electrons, fission
B. Charged Electrons, Chemical Bonding
C. Valence Electrons, Physical Bonding
D. Valence Electrons, Chemical Bonding
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Definition
| D. Valence Electrons, Chemical Bonding |
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Term
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Definition
| A notation showing the valence electrons surrounding the atomic symbol. |
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Term
Sodium, Na, atomic number 11, has only one valence electron. Upon losing this electron, what other atom in the periodic table does the sodium thus resemble?
A. Neon, Ne, atomic number 10
B.Magnesium, Mg, atomic number 12
C.Lithium, Li, atomic number 3
D.Sodium can only resemble sodium. |
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Definition
A. Neon, Ne, atomic number 10 |
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Term
An atom that has lost or gained one or more electrons is called:
A. Charged atom
B. Ion
C. Electron-Dot Structure
D. Positive Ion
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Definition
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Term
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Definition
| Typically formed by the loss or gain of a hydrogen ion, H+ |
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Term
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Definition
| The electrical force of attraction between oppositely charged ions |
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Term
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Definition
| An atom that has lost or gained one or more electrons |
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Term
What is the chemical formula for a compound made of aluminum ions, Al3+, and oxygen ions, O2–?
A. AlO
B.Al3O2
C.Al2O3
D.Al6O6 |
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Definition
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Term
What is the chemical formula for a compound made of magnesium ions, Mg2+, and oxygen ions, O2–?
A. MgO
B.Mg2O2
C.Mg4O4
D.Any of the above |
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Definition
A. MgO
Explanation:
The chemical formula is used to show the ratio by which atoms combine. By convention, the lowest numbers are preferred, so 1:1 is used rather than 2:2. The numeral 1, however, is implied when no subscript is written. |
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Term
What is significant about metallic bonds?
•Outer electrons in metal atoms are held only weakly by the nucleus.
•This weak attraction allows the electrons to move about quite freely.
•This mobility of electrons accounts for many metallic properties.
All of the above
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Definition
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Term
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Definition
| a mixture of metallic elements |
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Term
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Definition
| The type of electrical attraction in which atoms are held together by their mutual attraction for shared electrons |
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Term
In a Covalent Bond, atoms are held together by their:
A. mutual attraction for shared electrons
B. Valence electrons
C. positive charges
D. negative charges
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Definition
| A. mutual attraction for shared electrons |
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Term
How many electrons are contained within a single covalent bond?
A. 1
B. 2
C. 3
D. 4 |
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Definition
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Term
True or False:
The number of covalent bonds an atom can form equals its number of unpaired valence electrons. |
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Definition
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Term
True or False:
Multiple covalent bonds are never possible |
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Definition
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Term
| Electrons within a covalent bond are shared evenly when |
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Definition
| the two atoms are the same |
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Term
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Definition
The ability of a bonded atom to pull on shared electrons. Greater electronegativity means greater “pulling power.” |
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Term
| Electrons within a covalent bond are shared unevenly when |
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Definition
the bonded atoms are different. |
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Term
Which is heavier: carbon dioxide, CO2, or water, H2O?
A. Carbon dioxide is heavier.
B.Water is heavier.
C.They both have the same number of atoms so they weigh the same.
D.It depends. |
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Definition
A. Carbon dioxide is heavier.
Explanation:
Look to the Periodic Table and add up the masses of the atoms within each of these substances. Carbon dioxide adds up to 44 amu, while water is only 18 amu. So, carbon dioxide is more than twice as heavy. At room temperature, carbon dioxide is a gas because it is nonpolar |
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Term
Water has such a relatively high boiling point because water
A. is such a heavy substance.
B.is transparent so that heat passes right through it.
C.contains three atoms per molecule.
D.molecules are so sticky. |
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Definition
D.molecules are so sticky
Explanation:
The slightly negative end of one water molecule holds onto the slightly positive end of another water molecule. This force of attraction must be overcome before the liquid water can transform into the gaseous phase. |
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Term
If polar bonds within a molecule are facing in equal and opposite directions:
A. The bond becomes electrically charged
B. The bond is stronger
C. The polarity of the bond may cancel itself out
D. None of the above
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Definition
| C. The polarity of the bond may cancel itself out |
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Term
Ion–dipole
The attraction between an ion and a dipole. Give an example:
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Definition
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Term
• Dipole–dipole
The attraction between
two dipoles. Give an example:
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Definition
cohesive
forces within water |
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Term
Is it possible for a fish to drown?
A. No, because fish breathe water.
B.Yes, when the water contains too little oxygen.
C.No, because water is 88.8% oxygen by mass.
D.Yes, when the water is not moving. |
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Definition
| B.Yes, when the water contains too little oxygen. |
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