When naming a binary covalent compound, what determines the prefix for an element in the compound?
The number of valence electrons in the element.
The total number of atoms in the compound.
The number of atoms of that element in the compound.
The number of different elements in the compound.
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In hybridization, how do you know how many hybrid orbitals are formed?
It is the same as the number of orbitals that have combined.
It is the same as the number of valence electrons.
It is the same as the total number of atoms in the molecule.
It is the same as the total number of electrons.
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If a polyatomic ionic compound has gained two hydrogen ions, such as H2 PO4 -. How does its name begin?
Hydrogen (II)
Hydrogen
Hydrous
Dihydrogen
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In larger atoms, why can outer electrons move more freely?
atoms have more protons, which means more electron moves
Electrons are in higher energy shells, less tightly held.
Larger atoms have more electrons, atom less stable
no answer
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How many elements of unsaturation does a molecule with this chemical formula have? C5H8
3
5
1
2
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Which of the following is an example of an ionic compound?
CO2
NaCl
O3
Na
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Why must we consider a molecule's shape when determining its polarity?
Symmetrical molecules are always non polar.
Non polar molecules have dipoles that do not cancel out
A molecule may have different shapes depending its polarity
The shape reveals more about distribution of charge.
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How many valence electrons are in a carbon dioxide (CO2) molecule?
12
8
16
24
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If a central atom of a molecule only has two electron domains, what is the bond angle associated with the molecule?
120o
180o
109.5o
90o
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When drawing Lewis dot structures, what should you do if you run out of electrons before all atoms are satisfied?
Make a resonance structure.
Try double or triple bonds.
Add the missing electrons.
Leave it as it is.
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What do you look at in the periodic table to determine the number of valence electrons possessed by an element?
The element's row number.
The element's atomic mass.
The element's group number.
The element's atomic number.
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Identify the atom that is likely to have the highest electronegativity.
Metal magnesium, atomic number 12
Non-metal selenium, atomic number 34
Non-metal oxygen, atomic number 8
Metal beryllium, atomic number 4
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What happens when both of the orbitals in a molecule are in phase, either both positive or both negative, and the electrons in the bonds are at their lowest energy level?
Bonding takes place.
The atoms don't bond.
The chemicals don't react.
The electrons in the atoms don't share orbitals.
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What is an example of a naturally occurring inorganic macromolecule?
Nucleic Acid
Diamond
Sucrose
Glucose
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How does an atom try to achieve a complete valence shell?