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Science Term 2 Jason.N 8-9 D - Coggle Diagram
Science Term 2 Jason.N 8-9 D
Molecules
Electrical conductivity.
Oxygen gas normally is the molecule O2, but it can also be O3 which we call ozone.
Oxygen gas normally is the molecule O2, but it can also be O3 which we call ozone.
Example: H2O , N2, 03 and Ca0
All compounds are molecules, but not all molecules are compounds.
Base
Bases change the colour of litmus from red to blue.
They are bitter in taste.
Bases lose their basicity when mixed with acids
They can conduct electricity.
Bases feel slippery or soapy.
Some bases are great conductors of electricity.
Bases like sodium hydroxide, potassium hydroxide, etc are used as electrolytes.
Alkalis are bases that produce hydroxyl ions (OH-) when mixed with water.
Strong alkalis are highly corrosive in nature whereas other alkalis are mildly corrosive.
The pH value of bases ranges from 8-14.
The different kinds of acids are strong base acid, weak base acid, concentrated base, dilute base, monoacidic base, diacidic base and triacidic base.
ions
They form crystal
They have high melting points and high boiling points
They have higher enthalpies of fusion and vaporization than molecular compounds.
They're hard and brittle
They conduct electricity when they are dissolved in water
hey're good insulators.
Atoms
Atoms are neutral
The atom structure proton, neutron and electron
Atom is very small, having a radius of approximately 0.1 nm.
Not all atoms have the same size
example of atom Neon, Hydrogen argon and many more
Acid
Acids change the colour of litmus from blue to red
They convert the colour of Methyl Orange from Orange/Yellow to Pink.
Acids turn the pink colour of Phenolphthalein to colourless
Acids can conduct electricity.
Some Acids are highly corrosive in nature which means that they corrode or rust metals.
Acids tend to evolve hydrogen gas whilst reacting with an active metal such as Zn, Mg, etc.
They produce H+ ions when mixed with water.
Acids lose their acidity when mixed with a base.
When equal amounts of acid and base are combined the process of neutralization occurs and salt and water is formed,
The pH value of acid is from 0-6. Learn the concept of pH value here.
They are classified on the basis of their sources, strength, concentration, the presence of oxygen and its basicity.
The different types of acids are organic acids, mineral acids, strong acids, weak acids, concentrated acids, dilute acids, Oxy-acids, Hydracids, monobasic acids, dibasic acids, and tribasic acids.
salt
colourless
pHs level 7
taste salty
Sodium chloride ', also known as salt
Sadium chloride also known as NaCI
NaCI is also known as salt
transparent