C1 - ATOMS 0.0 / 5 ? ChemistryAtoms and compoundsAtomsGCSEAQA Created by: ShadoCreated on: 10-05-16 22:05 What is an Element? substance made up of only one type of atom 1 of 13 What is a Compound? substance made when 2 or more elements are chemically bonded together 2 of 13 Proton found in nucleus, relative charge (+1), relative mass (1) 3 of 13 Neutron found in nucleus, relative charge (0), relative mass (1) 4 of 13 Electron orbits nucleus, relative charge (-1), relative mass (close to 0) 5 of 13 Why does an atom have no overall charge? Because the no. of protons (which are positive) is equal to the no. of electrons (which are negative) 6 of 13 What is the overall charge of the NUCLEUS ? positive 7 of 13 Electrons -arranged around nucleus in shells -> each shell represents a different energy level -> the higher the energy level, the farthest from the nucleus 8 of 13 What the a group number of an element tell you? how many electrons it has in its outershell 9 of 13 Group 0 elements / "Noble Gases" they are unreactive bc their atoms have a stable arrangements of electrons (they have a complete outershell) 10 of 13 Forming Ions Metal atoms -> positive ions // Non-metal ions -> negative ions 11 of 13 Explain ionic bonding opposite charges attract each other -> therefore there are strong attractions between the positive and negative ions in metal + non-metal compound 12 of 13 As no new atoms are created or destroyed... TOTAL MASS OF REACTANTS = TOTAL MASS OF PRODUCTS 13 of 13
Comments
No comments have yet been made