1. Which of the following best describes what the steam engine improved? A. water travel
B. how both goods and people could be moved
C. factory efficiency
D. manufacturing

(a) In ascending order of reactivity:

1. Cesium(Cs)

2. Potassium(K)

3. Lithium(Li)

(b) (i) Reaction of Cesium with water produces:

Colorless basic solution of Cesium hydroxide and hydrogen gas.

(ii) Cesium+Water—>Cesium Hydroxide+Hydrogen

•2Cs + 2H²O —> 2CsOH + H²

(iii) a) toxic and violent reaction

b) catch fire

c) release of a large amount of hydrogen gas

(c) Alkali Metals