Most of the oxides of non-metals combine with water to form:
Correct answer: D. An acid
- A. hydrogen gas
- B. salt and water
- C. a base
- D. An acid
Explanation
Non-metals are the elements that form negative ions by accepting or gaining electrons. Oxides of non-metals combine with water to form acids. For example, sulfur and nitrogen are non-metals. Their oxides are sulfur dioxide and nitrogen oxide, respectively. When they combine with water, they form sulfuric acid and nitric acid. These are responsible for acid rain.
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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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