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Chemistry LibreTexts

Answers to Periodic Table and Simple Ionic Compounds

  1. Complete the following Table:

Symbol

Atomic Number

Mass Number

Number of Protons

Number of Neutrons

Number of Electrons

Net Charge

\(\mathrm{^{34}_{16}Se^{2-}}\)

16

34

16

18

18

-2

\(\mathrm{^{51}_{23}V^{3+}}\)

23

51

23

28

20

+3

\(\mathrm{^{40}_{20}Ca^{2+}}\)

20

40

20

20

18

+2

  1. Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion is the most likely in each case?
  1. K should lose one electron to form K+
  2. F should gain one electron to form F
  3. Ca should lose two electrons to form Ca2+

 

  1. Fill in the following table:

Name

Symbol

Group

Period

Metal, nonmetal or metalloid?

transition metal or main group?

sodium

Na

1

3

metal

main group

iron

Fe

8

4

metal

transition metal

oxygen

O

16

2

nonmetal

main group

  1. Give the formulas for the ionic compounds made of the following ions:
  1. ScBr3
  2. K2O
  3. CaI2
  4. Cr2S3
  5. RbF
  6. MgO
  7. K3N
  8. SrF2
  9. Al2S3