Out of 280 natural isotopes, how many have even atomic number and mass number?
Correct answer: C. 154
- A. 152
- B. 153
- C. 154
- D. 155
Explanation
Option A 152 isotopes have not even atomic and mass numbers. Option B It is also wrong because 153 isotopes have not even atomic and mass numbers. Option: C Out of 280 isotopes that occur in nature, 154 have even mass numbers and even atomic numbers. Option D It is also wrong because 155 isotopes out of do 280 not have even atomic and mass numbers.
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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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