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Question 1
Anions are ions with a negative charge.
- True
- False
Question 2
Which quantum number determines the electron's main energy level (shell)?
- n
- l
- ml
- ms
Question 3
Which principle states that no two electrons in an atom can have the same four quantum numbers?
- Pauli exclusion principle
- Hund's rule
- Aufbau principle
- Heisenberg uncertainty principle
Question 4
Diamagnetic materials are attracted or pulled into an external magnetic field.
- True
- False
Question 5
Avogadro's number is ______ particles per mole.
Fill in the blank
Question 6
Which element is paramagnetic?
- Li
- He
- Both He and Li
- Neither He nor Li
Question 7
What is the speed of light in a vacuum?
- 3.0 × 10^8 m/s
- 3.0 × 10^8 J·s
- 6.626 × 10^-34 J·s
- 6.022 × 10^23 mol^-1
Question 8
Which quantity measures how strongly atoms attract electrons?
- Electronegativity
- Ionization energy
- Electron affinity
- Effective nuclear charge
Question 9
According to the Bohr model, the atom is mostly empty space with electrons orbiting a small, fixed, positively charged nucleus.
- True
- False
Question 10
The maximum number of electrons in a shell with principal quantum number n is ______.
Fill in the blank
Question 11
As bond order increases, what happens to bond strength and bond length?
- Bond strength increases and bond length decreases
- Bond strength increases and bond length increases
- Bond strength decreases and bond length decreases
- Bond strength decreases and bond length increases
Question 12
What is the amount of energy required to remove an electron from an atom?
- Ionization energy
- Electron affinity
- Electronegativity
- Effective nuclear charge
Question 13
A coordinate covalent bond is a bond in which ______.
- one atom provides both of the bonding electrons
- two atoms share one pair of electrons equally
- two atoms share one pair of electrons unequally
- valence electrons are completely transferred from one atom to another
Question 14
In general, what electronegativity difference (ΔEN) defines a nonpolar bond?
- ΔEN less than 0.5
- ΔEN between 0.5 and 1.7
- ΔEN greater than 1.7
- ΔEN exactly 1.7
Question 15
What range of electronegativity difference (ΔEN) defines a polar bond?
- ΔEN between 0.5 and 1.7
- ΔEN less than 0.5
- ΔEN greater than 1.7
- ΔEN equal to 0
Question 16
Cations are negatively charged ions.
- True
- False
Question 17
Crystalline lattices are large, organized arrays of ions.
- True
- False
Question 18
Hydrogen bonds are most often formed between hydrogen and which elements?
- Oxygen, nitrogen, and fluorine
- Oxygen, nitrogen, and chlorine
- Carbon, hydrogen, and oxygen
- Nitrogen, phosphorus, and sulfur
Question 19
According to the source material, the general term van der Waals forces includes which two types of forces?
- Dipole-dipole and London dispersion
- Ionic and covalent
- Hydrogen bonding and ionic bonding
- Sigma and pi bonding
Question 20
Dipole-dipole forces are attractive forces between what?
- The positive end of one polar molecule and the negative end of another polar molecule
- A temporary dipole and a neighboring induced dipole
- Hydrogen atoms and oxygen, nitrogen, or fluorine atoms
- Oppositely charged ions in a crystal lattice
Question 21
London dispersion forces are temporary attractive forces created when a temporary dipole induces a dipole in a neighboring molecule.
- True
- False
Question 22
Bonds formed by head-on overlap between atomic orbitals are called ___ bonds.
Fill in the blank
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