Which of the following are procedures you will be doing in Exploring Periodic Tr
ID: 557345 • Letter: W
Question
Which of the following are procedures you will be doing in Exploring Periodic Trends? One or more answers are correct. You will receive negative points for incorrect answers.
a. Examine properties of nobel gases before and after running a high voltage current through them.
b. Test alkaline earth metals reactivity in acid.
c. Compare the reactivities of halides and halogens to see which halogen can steal an electron from which halide.
d. Test alkali metals reactivity in acid.
e. TA will demonstrate alkali metals reactivity in water.
f. Examine period trends based on the observations you made about group trends.
g. Compare the tendency for group 2A ions to form precipitates.
a. Examine properties of nobel gases before and after running a high voltage current through them.
b. Test alkaline earth metals reactivity in acid.
c. Compare the reactivities of halides and halogens to see which halogen can steal an electron from which halide.
d. Test alkali metals reactivity in acid.
e. TA will demonstrate alkali metals reactivity in water.
f. Examine period trends based on the observations you made about group trends.
g. Compare the tendency for group 2A ions to form precipitates.
Explanation / Answer
c. Compare the reactivities of halides and halogens to see which halogen can steal an electron from which halide.
f. Examine period trends based on the observations you made about group trends.
g. Compare the tendency for group 2A ions to form precipitates.
e. TA will demonstrate alkali metals reactivity in water.
Reasons: Never test alkali or alkaline earth metals in acid, it is explosive due to release of hydrogen gas and a lot of thermal heat energy sufficient to ignite hydrogen gas and explode. Even with water it is dangerous except under the supervision of qualified person like your TA. Higher electronegative halogens will replace lower electronegative halide ions from solutions. Chlorine can replace bromide in solution.
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