New Worksheet - Science - Protons, Electrons, and Neutrons

Directions
List how many protons, electrons, and neutrons each atom has.
Note: the number listed is the mass number.

1. Br – 78
protons: ________
electrons: ________
neutrons: ________

2. Sr – 85
protons: ________
electrons: ________
neutrons: ________

3. Mg – 22
protons: ________
electrons: ________
neutrons: ________

4. Si – 29
protons: ________
electrons: ________
neutrons: ________

5. Se – 77
protons: ________
electrons: ________
neutrons: ________

6. O – 16
protons: ________
electrons: ________
neutrons: ________

7. K – 38
protons: ________
electrons: ________
neutrons: ________

8. Hf – 177
protons: ________
electrons: ________
neutrons: ________

9. Pt – 195
protons: ________
electrons: ________
neutrons: ________

10. Cs – 133
protons: ________
electrons: ________
neutrons: ________


© 2018 Laura Glassel – lizzietutoring.blogspot.com