The group 1 elements are all soft, reactive metals with low melting points. They react with water to produce an alkaline metal hydroxide solution and hydrogen. Reactivity increases down the group.
Where on the periodic table are the alkali metals found?
On the left
In the middle
On the right
Which of the following is a property of the alkali metals?
They are soft
They have high melting points
They are poor conductors of electricity
What happens to the melting point of the elements as you go down group 1?
It stays roughly the same
When sodium reacts with water, which of the following is an accurate description?
It sinks and burst into flames
It fizzes and melts into a ball
It makes a white solid
What are the two products when potassium reacts with water?
Potassium hydride and oxygen
Potassium hydroxide and hydrogen
Potassium oxide and hydroxyl
What happens to the reactivity of the elements as you go down group 1?
Why is sodium more reactive than lithium?
Its outer electron is lost more easily
It has more electrons to lose
It has more protons in the nucleus
Which is the correct word equation for the reaction of lithium with water?
lithium + water → alkali + hydrogen
lithium + water → sodium hydroxide + hydrogen
lithium + water → hydrogen + lithium hydroxide
What happens to universal indicator when it is added to the solution produced when rubidium reacts with water?
It turns red
It stays green
It turns purple
Which is the correct balanced equation for the reaction of caesium, Cs, with water?
2Cs(s) + 2H2O(l) → 2CsOH(aq) + H2(g)
Cs(s) + H2O(l) → CsOH(aq) + H2(g)
2Cs(s) + 2H2O(l) → 2CsH(aq) + O2(g)