- Group 1 elements are soft metal and can be cut with a knife
- Silvery grey surface
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjT2qmteABeuLTJmPABUBTz1n3J3VCzvGQZmoU8nWyinO9XcVxUq25c8_QFW-U1OnXyhECmE40JLS52alHjH4J1o6KTGAU8QR7NI6Gq61bv5Bwxjxw470B2EiOHZyPh4zfzZBf3uxorUvk/s280/natrium.jpg)
- Low density compared to other metals
- Lower melting and boiling points than most other metals
As the atomic radius increases, the charges are further apart and the electrical attractive force is reduced. This results a weaker metallic bond and little heat energy is needed to overcome the bond. Thus, the melting/boiling point decreases as we go down the group.
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