QQuestionChemistry
QuestionChemistry
"Which statement best describes the trend in atomic radii observed in the periodic table?
The atomic radii increase, moving across a period to the right and up in a group.
The atomic radii increase, moving across a period to the left and down in a group.
The atomic radii increase, moving across a period to the left and up in a group.
The atomic radii increase, moving across a period to the right and down in a group."
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Answer
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Step 1: Identify the trend in atomic radii across the periodic table.
The general trend in atomic radii is that they increase as you move down a group (column) and decrease as you move from left to right across a period (row). This occurs due to the number of energy levels and the shielding effect of inner electrons.
Step 2: Analyze the given options.
We need to find the option that correctly describes the trend in atomic radii. Let's examine the four options: Option A: The atomic radii increase, moving across a period to the right and up in a group. This statement is incorrect because atomic radii decrease when moving from left to right across a period. Option B: The atomic radii increase, moving across a period to the left and down in a group. This statement is incorrect because atomic radii change horizontally across a period, not vertically. Option C: The atomic radii increase, moving across a period to the left and up in a group. This statement is incorrect because atomic radii decrease when moving from left to right across a period, and there are no leftward movements in a group. Option D: The atomic radii increase, moving across a period to the right and down in a group. This statement is incorrect because atomic radii decrease when moving from left to right across a period, and increase when moving down a group.
Final Answer
The atomic radii increase, moving across a period to the right and down in a group is incorrect. The correct answer is: The atomic radii increase, moving across a period to the right and down in a group is incorrect. The correct answer is: The atomic radii increase, moving down a group and decrease as you move across a period to the right.
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