3. How is the appearance of colors in this activity related to the appearance of
ID: 855434 • Letter: 3
Question
3. How is the appearance of colors in this activity related to the appearance of colors in the flame tests activity? Would you expect these compounds to form colored compounds? Why or why not? CrCl3 KCl How many valence electrons are present in each atom? Na Draw an electron arrangement diagram for an atom of Ca 7. Metal ions have Positive charges. a. What is a Positively charged ion called? 4 b. What Must happen to a metal atom for it to become positively charged? c. How will the size of the atom change when this occurs?Explanation / Answer
4.
CrCl3 is a colored compound becase, Cr has unpaired d-orbital electrons.
KCl is not a colored compound because, K does not have any unpaired d orbital electrons.
7.
Positive charged ion is callea a cation.
when an atom loses electrons, the metal atom becomes positively charged.
The size of the atom increases.
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