Jan,25 2021
1. 8
What is the atomic number of oxygen (O)?
2. 13 How many protons does an aluminum (Al)
atom have?
3. 20 How many electrons does a calcium (Ca) atom
have?
For #4 –6, consider a potassium (K) atom with a
mass number of 40:
4. 19 How many protons does this atom have?
5. 19 How many electrons does this atom have?
6. 20 How many neutrons does this atom have?
For #7 –9, consider the atom with A = 95 and Z = 42:
7. 54 How many neutrons does this atom have?
8. 42 How many protons does this atom have?
9. Mo What is the chemical symbol for this element?
For #10 –12, consider the atom with 35 protons,
35 electrons, and 45 neutrons:
10. Br What is the chemical symbol for this element?
11. 80 What is the atomic number of this atom?
12. 35 What is the mass number of this atom?
For #13 –15, consider a copper (Cu) atom with a mass number of 64:
13. 29 What is the Z value for this atom?
14. 64 What is the A value for this atom?
15. 35 How many neutrons does this atom have?