Which statement is incorrect ?
Correct answer: D. All the metals form acidic oxides
- A. All the metals are good conductor of electricity
- B. All the metals are good conductor of heat
- C. All the metals form positive ions
- D. All the metals form acidic oxides
Explanation
Metal oxides are not all acidic: many are basic, and some such as aluminium oxide are amphoteric. Metals generally conduct heat and electricity and tend to form positive ions by losing electrons. Students may choose option a or b because “all” has exceptions in strict science, but option d is the intended clearly incorrect statement.
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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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