ACIDS AND ALKALI
salt = sodium chloride
acid + alkali -> salt and water
acid + metal -> salt + hydrogen
acid + metal carbonate -> salt + water + hydrogen
A base is a substance that neutralises an acid. bases are solids but can be dissolved in water to form an alkali e.g. sodium hydroxide
All acids in water contain H+. All alkalis in water contain ionsm OH-. Whent these 2 ions react the make the formula:
Metal oxides and metal hydroxides are bases
e.g. Sulfuric acid + Copper oxide -> copper sulphate + water
H2SO4 + Cu0 -> CuSO4 + H20
Hydrochloric acid + copper hydroxide -> copper chloride + water
12-6 = neutrons
Rule for electron Shell: 2, 8, 8,
Number of electrons in the outer shell is the same as the number of the group the element is in. Group 0 has a full outer shell and are called noble gases.
Chlorine has 2 isotopes. Both have the same number of protons but different neutrons. 75% of the world's chlorine is the first one and 25% is the second one.
(35 x 75) + (37…