Textbook Question
Give the symbol of the element described by each of the following:a. the alkaline earth metal in Period 2
4. Atoms and Elements
Periodic Table: Element Symbols
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Based on the number of protons each element has, which would you expect to be chemically similar?
A
Z = 7 and Z = 8
B
Z = 22 and Z = 31
C
Z = 3 and Z = 11
D
Z = 32 and Z = 33
Verified step by step guidance1
Understand that elements are chemically similar if they belong to the same group in the periodic table, as they have similar valence electron configurations.
Identify the atomic number (Z) for each element: Z = 7 is Nitrogen (N), Z = 8 is Oxygen (O), Z = 22 is Titanium (Ti), Z = 31 is Gallium (Ga), Z = 3 is Lithium (Li), Z = 11 is Sodium (Na), Z = 32 is Germanium (Ge), and Z = 33 is Arsenic (As).
Recognize that elements in the same group have similar chemical properties. Lithium (Li) and Sodium (Na) are both in Group 1 (alkali metals), which explains their chemical similarity.
Examine the periodic table to confirm that Z = 3 (Li) and Z = 11 (Na) are indeed in the same group, while the other pairs are not.
Conclude that elements with similar chemical properties are those that share the same group in the periodic table, which is why Z = 3 and Z = 11 are chemically similar.
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