Chemistry

4. Ratio of a substance's mass to its volume
6. Same atomic number but different mass number
7. Process of applying a protective coat to prevent rust
8. An atom (isotope) has 4 electrons, 6 neutrons and 4 protons. Its net charge will be ____
11. Force between layers due to which viscosity changes
12. World's lightest solid
13. Hydrogen with mass number 3

1. Elements with the highest stability (have their outer shell completely filled with electrons) are called ______ gases
2. Intermolecular forces acting between water molecules
3. Particles of light
5. On increasing the temperature, the density ________
6. Branch of chemistry that deals with substances that are chemical combinations other than carbon
9. The only liquid whose solid state is less denser than the liquid itself
10. Color having the lowest wavelength