Chemistry HESI A2 Quizlet

Correct Answer: C

Rationale: The correct answer is C: +2. Alpha radiation particles are helium nuclei consisting of 2 protons and 2 neutrons, giving them a charge of +2. This charge is due to the presence of 2 protons, which are positively charged particles. Choice A (-2) is incorrect as alpha particles are positively charged. Choice B (0) is incorrect as alpha particles have a positive charge. Choice D (+1) is incorrect as alpha particles have a charge of +2 due to the presence of 2 protons.

Correct Answer: C

Rationale: The correct answer is C: Anions. Negatively charged ions are referred to as anions because they have gained extra electrons, resulting in a negative charge. Neutrons (A) are neutral particles found in the nucleus of an atom. Protons (B) are positively charged particles found in the nucleus. Cations (D) are positively charged ions that have lost electrons. Therefore, based on the definition of negatively charged ions, anions are the correct choice.

Correct Answer: B

Rationale: The correct answer is B: Nuclear. Nuclear reactions involve changes in the nucleus of an atom, such as nuclear fusion or fission, to achieve stable nuclear configurations by balancing the number of protons and neutrons. Chemical reactions (Choice A) involve changes in electron configurations, not the nucleus. Physical reactions (Choice C) involve changes in state or structure, not nuclear configurations. Mechanical reactions (Choice D) involve forces and motion, not changes in the nucleus for stability. Therefore, option B is the correct choice for reactions taking place in the nucleus to achieve stable nuclear configurations.

Correct Answer: C

Rationale: The correct answer is C: Element. An element is the simplest form of a substance that cannot be broken down further by chemical means. It consists of only one type of atom. Compounds (A) are made up of two or more different types of atoms chemically bonded. Mixtures (B) contain two or more substances physically mixed but not chemically bonded. Molecules (D) are combinations of atoms, which can be either elements or compounds.

Correct Answer: A

Rationale: The correct answer is A: Neutrons. Neutrons are neutral particles because they have no charge, unlike protons (positively charged), electrons (negatively charged), and cations (positively charged ions). Neutrons are found in the nucleus of an atom along with protons, contributing to the atomic mass without affecting the overall charge. This makes them essential for maintaining the stability of the nucleus. Therefore, neutral particles are called neutrons.