Chemistry HESI A2 Quizlet

Correct Answer: A

Rationale: The correct answer is A: Chemical. In chemical reactions, atoms interact to achieve stable electron configurations through sharing, gaining, or losing electrons. This process involves forming chemical bonds to reach a more stable state, following the octet rule. Nuclear reactions involve changes in the nucleus, not electron configurations. Physical reactions involve changes in state or phase, not electron configurations. Mechanical reactions involve forces and motions, not electron configurations. Therefore, the correct choice is A as it directly pertains to atoms achieving stable electron configurations through chemical interactions.

Correct Answer: B

Rationale: The correct answer is B (-2). Group VIA elements, also known as Chalcogens, have 6 valence electrons. They typically gain 2 electrons to achieve a stable octet configuration, resulting in a -2 charge. Option A (-1) is incorrect because gaining 1 electron would not complete the octet. Option C (-3) is incorrect because gaining 3 electrons is energetically unfavorable. Option D (0) is incorrect because Group VIA elements tend to gain electrons to achieve stability.

Correct Answer: A

Rationale: The Group VIIA elements, also known as the halogens, have a charge of -1. This is because they require one additional electron to achieve a stable octet configuration, making them highly reactive nonmetals. The correct answer is A (-1) because halogens readily gain one electron to fill their outer energy level. Choices B (-2) and D (1) are incorrect because the charge of Group VIIA elements is typically -1, not -2 or +1. Choice C (0) is incorrect because Group VIIA elements do not have a charge of 0; they have a tendency to gain an electron rather than lose one.

Correct Answer: A

Rationale: The Group IA elements, also known as alkali metals, have a +1 charge. This is because they have one valence electron, which they readily lose to achieve a stable electron configuration. This results in them forming ions with a +1 charge. Therefore, the correct answer is A. Choice B (+2) is incorrect because alkali metals do not typically form ions with a +2 charge due to their tendency to lose only one electron. Choice C (+3) is also incorrect as alkali metals do not form ions with a +3 charge. Choice D (0) is incorrect because alkali metals are known for their tendency to lose electrons to achieve a stable configuration, resulting in a positive charge.

Correct Answer: A

Rationale: Certainly! The correct answer is A: Radioactivity. Radioactivity refers to the emission of particles from an unstable nucleus due to nuclear instability. This process can include alpha, beta, or gamma decay. Choice B, Radiation, is a more general term that encompasses various types of energy emission, not specific to nuclear decay. Choice C, Decay, is a broader term and does not specify the emission from a nucleus. Choice D, Fusion, involves combining nuclei to form a heavier nucleus, not the emission of particles from an unstable nucleus.