In modern periodic table all the leements are arranged in ascending order of__________________?
Correct answer: C. Atomic number
- A. Valency
- B. Atomic mass
- C. Atomic number
- D. Valence electrons
Explanation
The modern periodic table arranges elements in increasing atomic number, which is the number of protons in the nucleus. The likely mistake is atomic mass, the basis of Mendeleev's earlier arrangement, but modern periodicity depends on atomic number.
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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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1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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