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Element families (alkali metals, alkaline earth metals, halogens, noble gases)

Chemistry • Organization of the Periodic Table • Transitional Reasoning • 1 questions

Element families (alkali metals, alkaline earth metals, halogens, noble gases) Transitional Reasoning Download PDF

Chemistry · The Periodic Table · Chemistry · Organization of the Periodic Table

1 Chemistry practice questions on Element families (alkali metals, alkaline earth metals, halogens, noble gases). Questions that build towards applied reasoning.

Questions

  1. 1.

    An investigator analyzes three unknown representative elements, X, Y, and Z, under standard conditions. Element X is a soft, lustrous solid that reacts vigorously with water to produce hydrogen gas and an alkaline solution, while Element Y is a colored diatomic nonmetal that readily reacts with active metals to form binary ionic salts. Element Z is a completely nonreactive monatomic gas that does not participate in chemical bonding under normal conditions. Based on these observations, which statement correctly classifies the element families and chemical behaviors of X, Y, and Z?

    • A) Element X is an alkaline earth metal with two valence electrons, Element Y is a noble gas with an octet, and Element Z is a halogen that forms diatomic molecules.
    • B) Element X is an alkali metal with one valence electron, Element Y is an alkaline earth metal that forms dipositive cations, and Element Z is a reactive halogen.
    • C) Element X is an alkali metal with one valence electron, Element Y is a halogen that readily gains one electron, and Element Z is a noble gas with a complete valence shell.
    • D) Element X is an alkaline earth metal that forms dipositive cations, Element Y is a halogen that readily loses an electron, and Element Z is an unreactive alkali metal.