First 30 Elements of the Periodic Table Quiz

1. A neutral atom has the shell electron arrangement 2, 8, 1. Which element is it?

2. Which element completes the first 30 elements by having atomic number 30?

3. An oxide ion, O²⁻, has 10 electrons. How many protons are in its nucleus?

4. Which element has atomic number 1?

5. A neutral aluminum atom has 13 protons. How many electrons does it have?

6. Which element would be expected to behave most similarly to magnesium because it is in the same periodic-table group?

7. Starting at atomic number 1 and moving forward, which is the first element commonly classified as a transition metal?

8. A particle has 17 protons and 18 electrons. Which species is it?

9. Which element is both in period 3 and in the halogen group?

10. What is the chemical symbol for sodium?

11. Which element lies directly between titanium and chromium in atomic-number order?

12. Which element among the first 30 is represented by the symbol K?

13. An atom's nucleus contains 12 protons. Which element is it?

14. Moving in atomic-number order, which element comes immediately after neon?

15. Which pair correctly matches atomic numbers 27 and 28 with their symbols, in that order?

16. Which of these elements has the greatest number of occupied electron shells in a neutral atom?