Question

question 18 (5 points)
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which of the following describes metallic character on the periodic table?
a) it increases as you move right to left within a period and down a group on the periodic table.
b) it increases as you move right to left within a period and up a group on the periodic table.
c) it increases as you move left to right within a period and up a group on the periodic table.
d) it increases as you move left to right within a period and down a group on the periodic table.

Explanation:

To determine the trend of metallic character on the periodic table, we analyze the periodic trends:

• Across a period (left to right): As we move from left to right in a period, the number of valence electrons increases, and the effective nuclear charge increases. This makes it harder for atoms to lose electrons, so metallic character (the tendency to lose electrons) decreases. Thus, metallic character increases when moving from right to left within a period.
• Down a group (top to bottom): As we move down a group, the number of electron shells increases, so the valence electrons are farther from the nucleus. This makes it easier for atoms to lose electrons, so metallic character increases when moving down a group.

Now we evaluate each option:

• Option A: States metallic character increases right to left (correct for period) and down a group (correct for group). This matches the trends.
• Option B: Says it increases up a group, but down a group is correct, so B is wrong.
• Option C: Says it increases left to right (wrong, it decreases left to right) and up a group (wrong), so C is wrong.
• Option D: Says it increases left to right (wrong), so D is wrong.

Answer:

A) It increases as you move right to left within a period and down a group on the periodic table.