Fichas
Chemistry
Fichas del conjunto (7)
- 1Elements and CompoundsElements contain only one atom.
Compounds contain 2 or more different atoms bonded together. - 2Mixture
- 3AtomAtoms only have 2 electrons in the first shell. the order of electrons is 2,8,8. The size of an electron is 1x10-7
- 4Balancing equations: Compounds with a metal and one non-metalThe metal comes first and the non-metal ends with 'ide'. Ex.
CuO - Copper Oxide - 5Balancing equations: Compounds with a metal and two non-metals with one non-metal being oxygen.The metal comes first and the first non-metal becomes 'ate'. Ex.
CuSO4 - Copper Sulphate - 6Balance this: Ca + O2 = CaO2Ca + O2 = 2CaO
- 7Atomic structure1.The number of protons define the element
2.If we change the number of neutrons, we make an isotope
3.If we change the number of electrons, we make an ion