1. How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. It is in period 4 and family 15 (5A or the Nitrogen family).

2.Two representative elements are in the same period of the periodic table. Which statement correctly describes the atoms of the two elements?

3. Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?

4. Which element has atoms with valence electrons in a higher energy level than those of calcium (Ca)

5.Which statement best describes the arrangement of electrons in an atom of fluorine (F)?

A representative element is an element whose properties can be used to discuss the chemistry of the group into which the element falls. Now we will try to answer each of the questions.

1) The atoms of arsenic and nitrogen have five valence electrons

2) The statement that correctly describes the two representative elements are in the same period of the periodic table is that they belong to the same period and have the same number of shells.

3) Helium is different from the other members of group 18 because it has 2 and not eight valence electrons

4) The element that has atoms with valence electrons in a higher energy level than those of calcium (Ca) is barium

5) The statements that best describes the arrangement of electrons in fluorine is that the the electronic configuration is [He] 2s2 2p5.

Learn more about representative elements:https://brainly.com/question/2040861

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