Chemistry HESI A2 Quizlet

Correct Answer: A

Rationale: The correct answer is A: Alpha, beta, gamma. Alpha radiation consists of helium nuclei, beta radiation includes electrons or positrons, and gamma radiation is electromagnetic radiation. This is correct as it covers all three types of radiation commonly encountered in nuclear physics. Choice B is incorrect as delta radiation is not a recognized form of radiation. Choice C is incorrect as delta and epsilon are not types of radiation, and choice D is incorrect as it does not include the correct types of radiation.

Correct Answer: C

Rationale: The correct answer is C: 3. In a triple covalent bond, 3 electron pairs are shared between two atoms. This results in the sharing of a total of 6 electrons, forming a strong bond. Each bond consists of one sigma bond and two pi bonds. Option A (1) is incorrect as a single bond involves one electron pair, while option B (2) is incorrect as a double bond consists of 2 electron pairs. Option D (4) is incorrect because a triple bond only involves 3 electron pairs being shared.

Correct Answer: B

Rationale: The correct answer is B because hydrogen bonding, dipole interactions, and dispersion forces are the three types of intermolecular forces. Hydrogen bonding occurs between molecules with a hydrogen atom bonded to a highly electronegative atom. Dipole interactions arise from the attraction between polar molecules. Dispersion forces are the weakest intermolecular forces and occur due to temporary fluctuations in electron distribution. Choices A, C, and D are incorrect because they do not accurately represent the three specific types of intermolecular forces.

Correct Answer: C

Rationale: Alpha particles are positively charged and relatively large, so they have low penetrating power. A piece of paper can stop alpha particles because the paper's thickness provides enough material for the particles to collide with and lose their energy through ionization. Aluminum foil and glass are not thick enough to effectively stop alpha particles. Plastic, depending on its thickness, may not provide sufficient shielding to stop alpha particles completely. In summary, the correct answer is C because the thickness of a piece of paper is sufficient to stop alpha particles, while the other choices are not adequate for effective shielding.

Correct Answer: C

Rationale: The correct answer is C: Ionic. In an ionic bond, electrons are transferred from one atom to another, resulting in the formation of positively and negatively charged ions that are attracted to each other due to electrostatic forces. This bond is formed between a metal and a non-metal. Covalent bonds (choice A) involve the sharing of electrons between atoms, not the transfer. Metallic bonds (choice B) occur between metal atoms sharing a sea of electrons. Hydrogen bonds (choice D) are weak attractions between a hydrogen atom and a highly electronegative atom.