Periodic Table

3. Which direction does atomic radius decrease in the periodic table? (In between the two words put a dash)
6. Which group contains the most reactive metals?
8. Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶?
11. Which element has the highest electronegativity in the periodic table?
16. Which has a smaller radius: a positive ion or its neutral atom? (put a dash in between the two words)
17. Which trend describes the increase in the ability of an atom to attract electrons as you move across a period?
18. In which period would you find an element with the electron configuration 2s² 2p⁶? (put a dash in between the word period and the number)
19. Which element has the highest first ionization energy in period 2?
20. Which block contains the transition metals? (Put a dash in between the letter and the word block)

1. Which block contains the alkali metals? (Put a dash in between the letter and the word block)
2. Which element would have the electron configuration ending in 3p⁶?
4. Which element has the largest atomic radius?
5. What is the name of Group 17 in the periodic table?
7. Which block contains the halogens? (Put a dash in between the letter and the word block)
9. Which is larger: the atomic radius of chlorine (Cl) or the ionic radius of chloride ion (Cl⁻)? (put a dash in between the two words)
10. Which element has the highest ionisation energy?
12. How many periods are there in the periodic table?
13. What group is known as the noble gases?
14. Which is larger: the atomic radius of sodium (Na) or the ionic radius of sodium ion (Na⁺)? (put a dash in between the two words)
15. Who is credited with creating the periodic table?