Chapter 4: Problem 5
What are elements \(90-103\) called?
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These are the key concepts you need to understand to accurately answer the question.
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Chapter 4: Problem 5
What are elements \(90-103\) called?
These are the key concepts you need to understand to accurately answer the question.
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The atomic number of yttrium, which follows strontium in the periodic table, exceeds the atomic number of strontium by one. Barium is 18 atomic numbers after strontium but it falls directly beneath strontium in the periodic table. Does strontium share more properties with yttrium or barium? Explain your answer.
Why is hydrogen in a class by itself?
Select an alloy. You can choose one mentioned in this book or find another one by checking the library or the Internet. Obtain information on how the alloy is made. Obtain information on how the alloy is used for practical purposes.
While at an amusement park, you inhale helium from a balloon to make your voice higher pitched. A friend says that helium reacts with and tightens the vocal cords to make your voice have the higher pitch. Could he be correct? Why or why not?
What periodic trends exist for ionization energy? How does this trend relate to different energy levels?
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