![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitco7gEdtXT8b2teX_yTF-Vt8Hfpru1kpJ9B4VHGdbGQ6MSkZK1_k2blq6iSsAiJcb_AzbTT9jioDtxtcyD9mQU2ZH9DpHIsoyIF8M5eDbHqhhMIyVHWv07O4MDBTOfPUHJPDI-58ckf0/s400/halogens.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEii_Z2C8u2v2A1PJd0uL9aHkthoQid2ojrpc11BCRwa9usIyQ39vgbIds02z-95iqFmfU8RM2JMKLWLr_PFUuiqwyfAfIlFKKYOkubiiDYu9KUVGV6k-g-B1XRJDJflqOjWaqP1phmxlG4/s320/halogens.jpg)
- The melting and boiling points increases down the group as the atomic radius increase.
- The van der Waals become stronger and thus more heat energy is needed to overcome these forces between the molecules.
- The physical state of halogens change gradually from gas to liquid to solid due to an increase in melting and boiling point.
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