Chemistry make up

• Arom


  Smallest particles of matter that we
• Periodic table


  A way to arrange the elements and show their patterns
• eleckon


  so cuter
• shell

  period shells
• Compound


  Made of atoms of different elements bonded together
• Mixture


  Different elements or compounds not bonded together
• Sodium: 11 Proton, Melechon, 12 neutrons
• 1st shell 2/, 2nd B, 3rd = 8
• ELECTION CONFIGURATIO

  Proton number, atomic number, nuclear mumber mass number
• Proton neurons


  Igual a nudeo on
• Group Vespecial


  Because they have a cull cule shell o electrons outreachue
• Isotopes

  Atoms of the some element. Some number of pores, different neutrons
• Chemical Changes


  1. One or more new substances are formed, 2. Energy is loses on, 3. Change is difficult to reverse
• Physical changes

  1. No new substances are formed, 2. You can reverse it
• Atoms bond to obtain a FULL ate shell

  Ion, Positive cation, Negative anion
• Atomic number is the number of protons</b>
• Mass number is the total number of protons and neutrons
• The number of electrons on the outer shell determines the group
• The periodic table is organised by increasing atomic number
• Elements are arranged into groups (columns) based on their electron configuration, with the first group containing elements that have one valence electron.
• Metals have low ionisation energy (easy to lose electron)
• Group 0 elements are called noble gases
• Noble gas atoms do not react as they have full outer shells
• Element


  Contains only one kind of atom
• Compound


  Made of atoms of different elements bonded together
• Mixture


  Contains different elements or compounds that are not bonded together, can usually be separated very easily
• Groups in periodic table

  • I
  • II
  • III
  • IV
  • V
  • VI
  • VII
  • VIII
• Groups 1, 2, and 9 are stable atoms
• Atomic mass


  Proton: 1, Neutron: 1, Electron: 0
• Atoms have no overall charge
• Electron shell


  Further from the nucleus, higher energy level
• Period number


  How many electron shells are occupied
• Group number


  Number of outer shell electrons
• Isotopes


  Atoms of the same element with the same number of protons but different number of neutrons
• Ar


  Average atomic mass of an element's isotopes
• Compound


  Atoms of different elements bonded together
• Compounds


  • H2O, CO2, CH3OH
• Signs of chemical change

  • One or more new chemical substances are formed
  • Energy is taken or given out
  • The change is usually difficult or impossible to reverse
• Chemical change


  Chemical reaction
• Physical change


  No new substances are formed, easy to reverse