General Chemistry: Exam 1 Practice Test
Questions and Answers | Latest Version
| 2024/2025 | Already Passed
What is the principle behind Rutherford's gold foil experiment?
- It demonstrated that atoms consist of a large, positively charged nucleus surrounded by
electrons.
- ✔✔ It showed that atoms have a dense, positively charged nucleus with electrons orbiting
around it.
- It proved that electrons are evenly distributed throughout the atom.
- It confirmed that atoms are indivisible particles.
Which of the following best describes the quantum mechanical model of the atom?
- It describes electrons as particles moving in fixed orbits around the nucleus.
- It depicts electrons as waves with specific quantized energy levels.
- ✔✔ It treats electrons as having both particle and wave characteristics, with their positions
described by probabilities.
- It suggests that electrons are located at random positions around the nucleus.
1
,What is the molecular shape of a molecule with a central atom that has two single bonds and two
lone pairs of electrons?
- Linear
- Trigonal planar
- ✔✔ Bent
- Tetrahedral
Which of the following elements has the highest electronegativity?
- Sodium
- Magnesium
- ✔✔ Fluorine
- Aluminum
What is the hybridization of the central atom in a molecule with a trigonal pyramidal shape?
- sp
- sp²
- ✔✔ sp³
- sp³d
2
, What type of intermolecular force is present in a sample of hydrogen chloride (HCl) gas?
- Ionic bonding
- Metallic bonding
- ✔✔ Dipole-dipole interactions
- Hydrogen bonding
What is the atomic number of an element that has 18 electrons and 18 protons?
-8
- 16
- ✔✔ 18
- 36
Which of the following statements about isotopes is correct?
- Isotopes of an element have the same number of neutrons but different numbers of protons.
- ✔✔ Isotopes of an element have the same number of protons but different numbers of neutrons.
- Isotopes of an element have different numbers of both protons and neutrons.
- Isotopes of an element have different numbers of protons and electrons.
3
Questions and Answers | Latest Version
| 2024/2025 | Already Passed
What is the principle behind Rutherford's gold foil experiment?
- It demonstrated that atoms consist of a large, positively charged nucleus surrounded by
electrons.
- ✔✔ It showed that atoms have a dense, positively charged nucleus with electrons orbiting
around it.
- It proved that electrons are evenly distributed throughout the atom.
- It confirmed that atoms are indivisible particles.
Which of the following best describes the quantum mechanical model of the atom?
- It describes electrons as particles moving in fixed orbits around the nucleus.
- It depicts electrons as waves with specific quantized energy levels.
- ✔✔ It treats electrons as having both particle and wave characteristics, with their positions
described by probabilities.
- It suggests that electrons are located at random positions around the nucleus.
1
,What is the molecular shape of a molecule with a central atom that has two single bonds and two
lone pairs of electrons?
- Linear
- Trigonal planar
- ✔✔ Bent
- Tetrahedral
Which of the following elements has the highest electronegativity?
- Sodium
- Magnesium
- ✔✔ Fluorine
- Aluminum
What is the hybridization of the central atom in a molecule with a trigonal pyramidal shape?
- sp
- sp²
- ✔✔ sp³
- sp³d
2
, What type of intermolecular force is present in a sample of hydrogen chloride (HCl) gas?
- Ionic bonding
- Metallic bonding
- ✔✔ Dipole-dipole interactions
- Hydrogen bonding
What is the atomic number of an element that has 18 electrons and 18 protons?
-8
- 16
- ✔✔ 18
- 36
Which of the following statements about isotopes is correct?
- Isotopes of an element have the same number of neutrons but different numbers of protons.
- ✔✔ Isotopes of an element have the same number of protons but different numbers of neutrons.
- Isotopes of an element have different numbers of both protons and neutrons.
- Isotopes of an element have different numbers of protons and electrons.
3
