The coloured glassy mass in borax bead test is due to the formation of___________________?
Correct answer: B. metal meta borate
- A. metal borate
- B. metal meta borate
- C. metal boride
- D. metal silicate
Explanation
In the borax bead test, borax forms a glassy boron oxide medium that reacts with a metal oxide to produce a coloured metal metaborate. Students may choose metal borate because it is a broader description, but the characteristic bead compounds are conventionally written as metaborates.
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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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