To solve this task, we need to fill out the key with the correct number of protons, neutrons, and electrons for an oxygen atom. Let's break it down step by step:
1.
Identify the number of protons:
- The atomic number of oxygen is 8. This means there are 8 protons in the nucleus of an oxygen atom.
2.
Identify the number of neutrons:
- The atomic mass of oxygen is approximately 16 (rounded from 15.9994).
- To find the number of neutrons, subtract the number of protons from the atomic mass: \( 16 - 8 = 8 \). So, there are 8 neutrons.
3.
Identify the number of electrons:
- In a neutral atom, the number of electrons is equal to the number of protons. Therefore, there are 8 electrons.
Now, let's fill out the key:
- Protons: 8
- Neutrons: 8
- Electrons: 8
Next, we need to draw the Bohr model of the oxygen atom. The Bohr model shows the nucleus in the center and electrons in orbitals around it. For oxygen:
- The first orbital (closest to the nucleus) can hold up to 2 electrons.
- The second orbital can hold up to 8 electrons.
So, we place 2 electrons in the first orbital and 6 electrons in the second orbital.
Final Answer:
Protons: 8
Neutrons: 8
Electrons: 8
Parent Tip: Review the logic above to help your child master the concept of atomic model worksheet.
