11. The s-block of the periodic table includes which groups?
a) Groups 1 and 2
b) Groups 1 and 3
c) Groups 2 and 17
d) Groups 1 and 18
Answer: a) Groups 1 and 2
12. Which of the following elements is an alkali metal?
a) Magnesium
b) Calcium
c) Sodium
d) Barium
Answer: c) Sodium
13. The s-block elements are characterized by having their outermost electrons in which type of orbital?
a) p-orbital
b) d-orbital
c) s-orbital
d) f-orbital
Answer: c) s-orbital
14. The reactivity of alkali metals with water increases as you move:
a) Up the group
b) Down the group
c) Across the period
d) From left to right
Answer: b) Down the group
15. Which alkali metal is the most reactive?
a) Lithium
b) Sodium
c) Potassium
d) Francium
Answer: d) Francium
16. The general electronic configuration of alkali metals is:
a) ns²np²
b) ns²np⁶
c) ns¹
d) ns²
Answer: c) ns¹
17. Which of the following is an alkaline earth metal?
a) Sodium
b) Potassium
c) Calcium
d) Lithium
Answer: c) Calcium
18. The s-block element with the largest atomic radius is:
a) Sodium
b) Magnesium
c) Potassium
d) Calcium
Answer: c) Potassium
19. Which of the following s-block elements is used in batteries?
a) Lithium
b) Sodium
c) Magnesium
d) Barium
Answer: a) Lithium
20. The reaction of alkali metals with halogens typically produces:
a) Oxides
b) Hydroxides
c) Halides
d) Peroxides
Answer: c) Halides