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A potassium atom has atomic number 19 and a mass number of 39 - Junior Cycle Science - Question d - 2010
Question d
A potassium atom has atomic number 19 and a mass number of 39. Complete the diagram using dots or crosses to clearly show the arrangement of electrons in the potass... show full transcript
Worked Solution & Example Answer:A potassium atom has atomic number 19 and a mass number of 39 - Junior Cycle Science - Question d - 2010
Step 1
Complete the diagram using dots or crosses
Answer
In the potassium atom, the arrangement of electrons can be represented as follows:
- The first shell (or orbit) holds 2 electrons.
- The second shell holds 8 electrons.
- The third shell holds 8 electrons.
- The fourth shell holds 1 electron.
Thus, to illustrate the electron configuration:
- First shell: • •
- Second shell: • • • • • • • •
- Third shell: • • • • • • • •
- Fourth shell: •
The complete diagram should show 2 electrons in the first orbit, 8 electrons in the second orbit, 8 electrons in the third orbit, and 1 electron in the fourth orbit, represented clearly by dots or crosses.