CH4= -162°C, SiH4 = -112°C, GeH4 = -88°C, SnH4= -52°C 1. What do these elements all have in common? 2. What are their states at room temperature? 3. How does the boiling point change as you go from CH4 to SnH4? 4. Explain this trend in boiling point using your knowledge of intermolecular forces

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