Atomic Radius Worksheet
Grade 12 Chemistry worksheet covering atomic radius trends, factors affecting it, and related concepts.
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Atomic Radius Worksheet
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Read each question carefully and provide concise, accurate answers based on your understanding of atomic radius and periodic trends.
1. Which of the following statements correctly describes the general trend of atomic radius across a period in the periodic table?
Atomic radius increases due to increased shielding.
Atomic radius decreases due to increased effective nuclear charge.
Atomic radius remains constant as the number of electron shells increases.
Atomic radius decreases due to a decrease in the number of protons.
2. Which element has the largest atomic radius?
Lithium (Li)
Sodium (Na)
Potassium (K)
Rubidium (Rb)
3. Atomic radius generally down a group in the periodic table due to the addition of new electron shells.
4. The effective nuclear charge across a period, leading to a stronger pull on the valence electrons and a smaller atomic radius.
5. The shielding effect describes the reduction in attraction between the nucleus and valence electrons due to the presence of electrons.
6. Explain why cations are generally smaller than their parent atoms, while anions are generally larger.
7. Describe the main factors that influence the atomic radius of an element.
8. The atomic radius of a nonmetal is generally smaller than that of a metal in the same period.
True
False
9. As you move from left to right across a period, the shielding effect increases significantly, causing the atomic radius to increase.
True
False
10. Observe the image below showing a simplified atomic structure. Based on your understanding of atomic radius, how would the atomic radius change if the number of electron shells increased while the effective nuclear charge remained constant?
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