Determine the number of valence electrons the following atoms have and how many electron shells:
1. Lead (Pb)
2. Iodine (1)
3. Gallium (Ga)
4. Barium (Ba)
5. Rubidum (RD)
6. Antimony (Sb)
7. Krypton (Kn)
8. Selinium (Se)

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source: