Gen Chem 1 Final Exam

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How many electrons can the p-orbital hold?

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Chemistry

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1

How many electrons can the p-orbital hold?

A p-orbital can hold a maximum of 6 electrons.

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2

What is the total number of allowed orbitals in a subshell?

The total number of allowed orbitals in a subshell is equal to 2l + 1, where l is the angular momentum quantum number.

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3

Which molecules contain 6 bonding electrons?

To determine the number of bonding electrons in a molecule, you would need to draw its Lewis structure and count the shared electron pairs.

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4

What do halogens need to become stable?

Halogens need 1 more electron to achieve a stable electron configuration.

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5

Which groups of elements do not follow the Octet Rule?

Some exceptions to the Octet Rule include boron, beryllium, and elements in the third period and beyond.

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6

Why do Lewis electron dot diagrams show only outermost electrons?

Lewis dot diagrams focus on the valence electrons, which are primarily involved in chemical bonding.

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7

What do you call a particle that gains an electron?

A particle that gains an electron becomes an anion.

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8

What do you call a particle that loses an electron?

A particle that loses an electron becomes a cation.

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9

What are electrically charged atoms or groups of atoms called?

These are called ions.

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10

What type of bond is found in the Lewis structure of Nitrogen gas, N₂?

Nitrogen gas (N₂) has a triple bond between the two nitrogen atoms.

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11

What is another name for quantum theory?

Wave mechanics.

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12

What describes the three-dimensional regions in space for finding an electron?

Orbital.

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13

Which is NOT a quantum number?

Mass number.

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14

What does the magnetic quantum number describe?

The orientation of an orbital in space.

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15

What symbolizes the spin of an electron?

mₛ.

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16

How many types of quantum numbers are there?

There are 4 types: principal, angular momentum, magnetic, and spin.

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17

What is a diamagnetic atom?

An atom with all paired electrons.

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18

Which rule states that electrons fill empty orbitals first?

Hund's rule.

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19

Which electron configuration is impossible for an atom?

An impossible configuration would violate the Pauli Exclusion Principle or Hund's Rule.

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20

Which element has a completely filled subshell?

Noble gases have completely filled valence shells.

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21

What substance has paired electrons resulting in no net magnetic moment?

A diamagnetic substance.

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22

Which element is typically diamagnetic?

Noble gases are typically diamagnetic.

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23

Which molecule has a double bond?

Molecules like O₂, CO₂, and C₂H₄ have double bonds.

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24

What characterizes an ionic compound?

It is formed by the transfer of electrons between atoms.

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25

What indicates the number of valence electrons with dots around the element?

Lewis dot structure.

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26

How many electrons must phosphorus gain or lose for stability?

Phosphorus needs to gain 3 electrons for a stable electron configuration.

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27

What is formed by sharing electrons between atoms?

Covalent bond.

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28

How is the octet rule applied in molecular covalent compounds?

Atoms share electrons to achieve 8 valence electrons.

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29

Which compounds have a covalent molecular structure?

Compounds like H₂O, CO₂, and CH₄ have covalent molecular structures.

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30

What type of bond is formed in Na₃PO₄?

Ionic bond.

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31

How many total valence electrons are in iodine trichloride, ICl₃?

Iodine trichloride has a total of 28 valence electrons.

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32

How many lone pairs are in the Lewis structure of ammonia, NH₃?

Ammonia has 1 lone pair.

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33

How many electrons do hydrogen need to fill its outer shell?

Hydrogen needs 1 electron.

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34

What describes a correct Lewis structure of N₂?

The correct Lewis structure of N₂ has a triple bond.

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35

Which symbol represents bonding pairs of electrons in a Lewis structure?

A line (-).

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36

What is the correct Lewis structure of iodine fluoride?

I-F with 3 lone pairs on I and 3 lone pairs on F.

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37

What pair of element valence is correct?

You can determine the valence electrons by the group's number on the periodic table.

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38

What is the correct Lewis structure of the cyanide ion?

C≡N⁻ with a lone pair on C and a lone pair on N.

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39

What does the product of charge and distance need for neutrality?

Dipole moment.

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40

What is the bond angle in a covalent species?

The angle between two bonds originating from the same atom.

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41

What does VSEPR theory predict?

The geometry of molecules based on electron pair repulsion.

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42

Why is knowing the geometry of a molecule important?

It helps predict polarity, reactivity, and physical properties.

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43

What is the polarity of boron trifluoride, BF₃?

Each B-F bond is polar, but the molecule is nonpolar due to symmetry.

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