Chemistry HESI A2 Quizlet

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: By their chemical properties. The periodic table arranges elements based on their atomic number, which determines their chemical properties. Elements in the same column have similar properties due to their shared electron configurations. This organization helps predict an element's behavior in chemical reactions. Choices A, C, and D are incorrect because atomic mass, physical state, and charge do not determine an element's position in the periodic table or its relationship to other elements.

Correct Answer: C

Rationale: The correct answer is C: Hydrogen bonding. Hydrogen bonding is the strongest intermolecular force due to the high electronegativity difference between hydrogen and elements like nitrogen, oxygen, or fluorine, leading to a strong partial positive charge on hydrogen. This allows for a strong attraction with the partial negative charge on the electronegative atom of another molecule. Dipole interactions (A) are weaker than hydrogen bonding, dispersion forces (B) are the weakest intermolecular force, and Van der Waals forces (D) are a broad term that encompasses all intermolecular forces, including hydrogen bonding.

Correct Answer: C

Rationale: The columns of the periodic table are called "Groups" because elements within the same group share similar chemical properties due to having the same number of valence electrons. Each group is designated by a number and a letter, indicating the number of valence electrons. Periods refer to the rows of the periodic table, representing the number of electron shells an element has. Families is a more colloquial term used to describe groups of elements with similar properties. Rows refer to the horizontal rows of the periodic table. Therefore, the correct answer is C as it specifically refers to the vertical columns in the periodic table that share similar chemical properties.

Correct Answer: A

Rationale: The correct answer is A: Periods. Periods are the horizontal rows in the periodic table that represent the number of electron shells an element has. Each period corresponds to the principal energy level of the element. Families (Choice B) are the vertical columns of the periodic table that share similar properties. Groups (Choice C) are also vertical columns that share similar chemical properties. Columns (Choice D) are not a term used in the context of the periodic table. Therefore, the correct term for the horizontal rows in the periodic table is periods.