Lithium and potassium are metals in Group I of the Periodic Table. Lithium has a melting point of $$\(181^{\circ} \mathrm{C}\)$$ and a density of $$\(0.53 \mathrm{~g} / \mathrm{cm}^{3}\)$$. Which row describes the melting point and density of potassium?
A.
B.
C.
D.
Exam No：0620_s24_qp_22 Year：2024 Question No：21
Answer:
B
Knowledge points:
8.1.1. Describe the Periodic Table as an arrangement of elements in periods and groups and in order of increasing proton number / atomic number
8.1.2. Describe the change from metallic to non-metallic character across a period
8.1.3. Describe the relationship between group number and the charge of the ions formed from elements in that group
8.1.4. Explain similarities in the chemical properties of elements in the same group of the Periodic Table in terms of their electronic configuration
8.1.5. Explain how the position of an element in the Periodic Table can be used to predict its properties
8.1.6. Identify trends in groups, given information about the elements
Solution:
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