the periodic table :
atoms are the smallest form of matter ever.
Atoms on the periodic table have atomic numbers, an atomic mass, and a symbol.
atoms on the periodic table are grouped by COLUMNS and rows.
- Group 1 :1 valence electron, alkali metals
- Group 2: 2 valence electrons, alkaline earth metals
- Group 3:12-Transition metals
- Group 13:3 valence electrons,non-metal
- Group 14:4 valence electrons,non-metal
- Group 15:5 valence electrons,non-metal
- Group 16:6 valence electrons,non-metal
- Group 17:7 valence electrons, non-metal, halogen
- Group 18:8 valence electrons, non-metal, noble gas
- Elements B, Si, Ge, As, Sb, Te, Po, At-Metalloids
- Compound-Two or more different atoms held together by a chemical bond
Molecule-Two or more atoms held together by a chemical bond.
Molecule-Two or more atoms held together by a chemical bond.