Which pair of elements have chemical properties that are most similar

Which pair of elements have chemical properties that are most similar

[tex]Which pair of elements have chemical properties that are most similar[/tex]

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  1. I think the answer is (1) Co. Because the element of Cobalt also has 2 electrons at the outer layer which is the same as Calcium. And the outer layer is an important factor which can affect the property of an element.

  2. I would say Neon because it is the closest on the periodic table, and the elements were sorted in order of similar properties. 

  3. Check out your periodic table. Elements in the same column (families) usually share similar properties because they have the same number of valence electrons. In this case, the only element listed that is part of Sodium's family is Lithium, so Lithium is most similar to Sodium.

  4. The answer is (2) chlorine. We can figure out some rules of properties of elements from the periodic table of elements. One of the important rule is that the elements which belongs to the same group has the similar properties. Fluorine and chlorine belong to the same group.

  5. Answer is: 2) chlorine.

    Fluorine (F) and chlorine (Cl) are halogen elements.

    Halogen elements are in group 17: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I). They are very reactive and easily form many compounds.

    Both of them form diatomic covalent molecules (F₂, Cl₂).

    Fluorine and chlorine are both in gaseous state.

    Both molecules have single covalent bond and they are very reactive.

    They have seven valence electrons.

    They need to gain one electron to have electron cofiguration like next to it noble gas.

    For example, fluorine has 9 electrons and it gain easily one electron in chemical reaction to have electron configuration like noble gas neon (Ne) with 10 electrons.

  6. Lithium, sodium, potassium, rubidium, cesium, and francium possess similar chemical properties to that of calcium.

    For further research, you could look at an online periodic table. 

    Hope this helps! 🙂

  7. The elements in group 7, which fluorine is in also, would have similar properties due to the valence electrons and the configuration. 

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