First group elements are generally the largest.
Larger the size larger is the density because there is large increase in mass with considerable increases in volume.
Hence density increases down a group as size increase down the group.
Do Group 1 metals have a high density?
Alkali Metals have lower melting and boiling Points. All Group 1 elements have one electron in their outermost shell which is held very weakly by the nucleus.
Which element has the highest density?
Osmium
Does density increase going down a group?
First group elements are generally the largest. Larger the size larger is the density because there is large increase in mass with considerable increases in volume. Hence density increases down a group as size increase down the group.
Which alkali metal has the highest density?
Example
Element | Melting point |
---|---|
Lithium, Li | 180°C |
Sodium, Na | 98°C |
Potassium, K | 63°C |
Rubidium, Rb | 39°C |
1 more row
Photo in the article by “President of Russia” http://en.kremlin.ru/events/president/news/60795