PERIODIC TABLE
Mention one property of transition elements different from group 1 elements.
They have variable oxidation states, act as catalysts, higher mp and bp, higher density, stronger, harder.
What is the formula of Aluminium Chloride?
AlCl3
What is the keywords for solids for separation, arrangement and particle movement?
Touching, Regular, Vibrate in fixed position
Another word for Group 1 metals
Alkali Metals
How many electrons in Ca2+ ion?
18
How can aluminium be extracted?
Electrolysis.
What happens if you mix bromine water with KI?
A reaction occurs, and iodine is produces, giving a brown solution.
Mention 2 properties of ionic bonds different from covalent bonds.
Ionic bonds have very high melting and boiling points, and conducts electricity when aqueous or in molten state.
What are 2 differences between evaporation and boiling?
Evaporation is a surface phenomenon and occurs at any temperatures below boiling point, whereas, boiling is a bulk phenomenon and occurs at a specific temperature called boiling point.
What is the colour and state of Bromine at RTP?
Red brown liquid
Give one difference between compounds and mixtures.
Compounds are two or more elements chemically bonded together, while, Mixtures are two or more substances NOT chemically joined together. ( An element is made up of one type of atom only, and cannot be broken down by chemical means )
What happens to H20 molecules when ice is heated to 0 degrees in a beaker?
It reaches its melting point, and intermolecular bonds break, and a state change occurs from ice to water.
How does melting point vary down the Group 1?
Decreases
Draw dot and cross structure of a molecule of Chlorine.
Correct answer checked by Unni Sir gets a point
What is the equation of Rf value?
Rf = Distance travelled by substance ( spot ) dividedby Distance travelled by solvent front.