Problem: Fill in the gaps in the following table:SymbolCo3+Protons347680Neutrons46116120Electrons3678Mass number59Net charge2+Complete the first row of the table.

FREE Expert Solution

We’re being asked to complete the first row of the table.

Recall that the symbol for an element or ion is as follows:

Recall that:

  • Atomic Mass = A number of protons + number of neutrons
  • Atomic NumberZ = number of protons = number of electrons
  • Net charge
    • number of electrons lost if positive (+)
    • number of electrons gained if negative (-)

The number of protons for each element is given in the second row.

For the 2nd Column

  • Recall that the number of protons is equal to the atomic number, thus in the periodic table, it is element 34 which is Selenium (Se).
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Problem Details
Fill in the gaps in the following table:


Mass number59

Net charge


Complete the first row of the table.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Ions concept. You can view video lessons to learn Ions. Or if you need more Ions practice, you can also practice Ions practice problems.

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