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  • Questions 1-3 refer to the following types of elements in the Periodic Table:

  • A) Noble gases B) Alkali metals

  • C) Halogens D) Transition elements

  • E) Actinides

  • Question 1 - which of the following types of elements are the most difficult to oxidize?

  • The answer is A, the Noble Gases. To answer this question, you need to know what the word

  • oxidizemeans. It can mean to combine with oxygen, but more generally it means

  • an atom or molecule loses electrons so it becomes positively charged. The elements

  • that are the most difficult to oxidize (or reduce, for that matter) are the Noble gases.

  • They are considered inert. Remember the noble gases are found in column 18 (group 18),

  • on the far right of the periodic table.

  • Question 2: Which elements are always radioactive?

  • These are the Actinides, which are found in that strip on the bottom of the periodic table.

  • You may not have realized that all the actinides were radioactive, but youve probably heard

  • of Plutonium and Uranium which are used in bombs. There are lots of other applications

  • using radioactive elements - for instance, Americium is used in metal detectors.

  • So, yeah, the answer is E.

  • Question 3: Which elements are most likely to form anions?

  • So you need to know an anion is a negatively charged ion. So the question is asking

  • which elements are most likely to accept an electron - one or more electrons -

  • and become negatively charged?

  • The group next to the noble gases,the Halogens, group 17, can accept one electron and become anions.

  • These are the elements like Fluorine, Chlorine, Bromine...

  • You know they accept electrons and become F-, Cl-, Br-, and so on.

  • When they do, they achieve a noble gas electron configuration and so then they are

  • very stable. The answer is C. You might be tempted by B, the Alkali metals, which are

  • in group 1, but those are most likely to form cations, positively charged ions. If they

  • donate an electron, and become cations, they also achieve noble gas electron configuration.

  • But again, that's cations, not don’t be fooled.

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Questions 1-3 refer to the following types of elements in the Periodic Table:

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