Science

Science

1. Acid

   • Hydrogen ions (H)
   • P.H. of 6 and below
   • Turns Blue litmus red
   • Neutralises bases

2. Base

   • Turns red litmus blue
   • P.Hof 8-14
   • Neutralises acids

3. Alkali

   • Base dissolved in water
   • Hydroxide ions OH-

4. Concentrated and dilute

   • Concentrated acid
     • Large amount of hydrogen ions and a small amount of water
   • Dilute acid
     • Large amount of water and a small amount of hydrogen ions

5. ION

   • An ion is an atom that has lost or gained one or more electrons

6. Atoms

   • Protons
     • Are Much larger
     • Positive charge
   • Electrons
     • are extremely small
     • Negative Charge
   • Neutrons
     • Are large
     • A similar mass to protons
     • Have no charge
   • Electron arrangement
     • 2,8,8

7. Periodic Table

   • Parts of the periodic table
     • Rows of elements which go horizontally called periods
     • collumns (vertically)
   • Mass Number
     • Mass number is the number of protons and neutrons total in the nucleus
   • Atomic Numbers
     • Equals number of protons and electrons in a nucleus
   • Element
     • Substance consisting of atoms that are the same or have the same atomic number