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The diagram shows an outline of the periodic table with four regions labelled A, B, C and D. An element has the ground state electron configuration [Ar] 3d7 4s2. In which region is it found? A. Region A B. Region B C. Region C D. Region D
Which row correctly describes how the properties of the halogens change down group 17, listed in the order: non-metallic character, boiling point of the element, atomic radius? A. Increases, increases, increases B. Decreases, increases, increases C. Decreases,…
Which oxide will react with water to produce the most basic solution? A. Potassium oxide B. Calcium oxide C. Sulfur trioxide D. Nitrogen dioxide
Why is the first ionization energy of potassium lower than that of sodium? A. Potassium has fewer protons in its nucleus than sodium B. The outer electron of potassium is in a higher main energy level, further from the nucleus and more shielded C. Potassium…
Which of these could be the ground-state electron configuration of an atom of a d block element? A. [Ar] 4s2 3d10 4p1 B. [Ne] 3s2 3d6 C. [Ar] 4s2 3d6 D. [Ar] 4s2 4p6
Which functional groups are present in this molecule? A. Secondary amine, hydroxyl, alkoxy B. Tertiary amine, alcohol, ketone C. Tertiary amine, hydroxyl, alkoxy D. Secondary amine, alcohol, ketone
Why do halogens form 1− ions? A. Highly exothermic electron affinity, so the atoms gain one electron B. Low ionization energy, so the atoms lose one electron C. High ionization energy, so the atoms gain one electron D. Low electronegativity, so the atoms gain…
Which of the following are structural isomers of the compound shown? I. 2-methylbut-2-ene II. 2-methylpent-1-ene III. pent-2-ene A. I and II only B. I and III only C. II and III only D. I, II and III
Which of these molecules are isomers of each other? I. Butanal II. 2-methylpropan-1-ol III. Butan-2-ol A. I and II only B. I and III only C. II and III only D. I, II and III
What is the correct classification of the molecule shown? A. Carboxylic acid B. Ketone C. Ether D. Ester