The bar chart shows the period of elements from lithium to neon.Which property of these elements is shown on the chart?
Correct answer: A. The number of electrons used in bonding
- A. The number of electrons used in bonding
- B. The number of electron shells
- C. The atomic number
- D. The atomic mass
Explanation
The correct answer is Option A: 'The number of electrons used in bonding'. As you move across the period from lithium to neon, the number of valence electrons increases from 1 in lithium to 8 in neon. This trend reflects how these elements can form bonds. Noble gases like neon do not typically form bonds because they have a full valence shell. Options B, C, and D do not accurately describe the trend shown in the chart. The number of electron shells (Option B) is constant across the period, the atomic number (Option C) does increase but does not specifically relate to bonding, and atomic mass (Option D) is not the focus of the chart as it pertains to bonding properties.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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