4.1 Flashcards
(19 cards)
What are the Group 1 elements commonly called?
Alkali metals
What do Group 1 elements react with to form alkaline solutions?
Water
What is a typical property of Group 1 elements when freshly cut?
Shiny
What is the state of alkali metals at room temperature?
Solid
What happens to the hardness of alkali metals as you go down the group?
Decreases
Which alkali metal is the hardest?
Lithium
What trend is observed in the density of alkali metals as you move down the group?
Increases
What unusual property does sodium have when handled?
Can burst into flames on water
Fill in the blank: A substance will float on water if its density is less than ______ g/cm³.
1.00
What trend is observed in the melting points of alkali metals as you go down the group?
Decreases
What is the general pattern of change in properties of alkali metals called?
Trend
True or False: Francium is found at the top of Group 1 in the Periodic Table.
False
What is the characteristic of Francium in terms of rarity?
Extremely rare
Which alkali metal is denser than expected?
Sodium
What is the melting point trend of alkali metals?
Decreases down the group
What is the significance of the density of water in relation to Group 1 elements?
Determines if they float or sink
Describe the softness of alkali metals.
Soft enough to cut with a knife
What happens to the physical properties of Group 1 elements as you go down the group?
Trends occur in density and melting points
What is the predicted melting point of rubidium (Rb)?
Lower than that of sodium
