BIOL 1500 Lecture Notes - Molecular Geometry, Trigonal Bipyramidal Molecular Geometry, Ionic Bonding

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Published on 19 Nov 2012
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he particle that has the smallest mass is?
Select one:
a. Atom
b. Neutron
c. Electron
d. Proton
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Which particle always has a negative charge?
Select one:
a. Neutron
b. Atom
c. Proton
d. Electron
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Which of the following elements requires the least amount of
energy to remove an electron to form an ion?
Select one:
a. Ca
b. K
c. Na
d. Mg
e. Fr
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According to the Lewis model of the atom, the number of
bonding electrons in a nitrogen atom is?
Select one:
a. 1
b. 2
c. 5
d. 3
e. 7
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The mass number refers to
Select one:
a. The number of protons in the nucleus of an atom
b. The total number of protons and electrons in the nucleus of an atom
c. The number of neutrons in atom
d. The number of electrons in an atom
e. The total number of protons and neutrons of an atom
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Atoms of the same element which have the same number of
protons but a different number of neutrons are known as
Select one:
a. Neutral atoms
b. Molecule
c. A chemical family
d. Ions
e. Isotopes
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2412Mg2+ contains (note, 24 should be directly over top of the 12)
Select one:
a. 12 protons, 12 neutrons and 14 electrons
b. 12 protons, 12 neutrons and 10 electrons
c. 12 protons, 12 neutrons and 12 electrons
d. 12 protons, 10 neutrons and 10 electrons
e. 24 protons, 12 neutrons and 2 electrons
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In which pair of elements is the element with the smaller electron affinity listed
first?
Select one:
a. Helium, neon
b. Sodium, magnesium
c. Fluorine, oxygen
d. Beryllium, lithium
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Which of the following statements about atomic structure is
TRUE?
Select one:
a. The number of protons, neutrons and electrons are always equal in a neutral
atom.
b. The number of neutrons and electrons are always equal in a neutral atom.
c. The number of protons and neutrons are always equal in a neutral atom.
d. The number of protons and electrons are always equal in a neutral atom.
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Which of the following is the most important factor in
determining the chemical properties of an element?
Select one:
a. The number of valence electrons
b. The total number of neutrons
c. The total number of electrons in its atoms
d. The total number of protons in the nucleus
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How many molecules are in 1 mole of Na2O?
Select one:
a. 1
b. 2