2.3 Period 3

Question 1

What links to the melting points of period 3 elements

Answer 1

Bond strength and structure

Question 2

Which three, period 3 elements have metallic bonding

look at periodic table

Answer 2

sodium
magnesium
aluminium

Question 3

Explain the trend from sodium to aluminium

Answer 3

Melting points increase
due to greater positive charged ions
(Na+1, Mg+2, Al+3)
which means more electrons are released into the sea of electrons, and there is stronger electrostatic forces of attraction.

Question 4

Explain the high melting point in Sillicon

Answer 4

Macromolecular
Strong covalent structure
Require alot of energy to overcom the covalent bonds
therefore high metling point

Question 5

What is the melting point of sillicon like

Answer 5

High

strong covalent bonds

Question 6

What are phosphorus, sulfur and chlorine

Answer 6

Simple covalent molecules

Question 7

What are the metling points like of Phosphorus, sulfure and chlorine

Answer 7

Kinda low

Question 8

Explain the melting points of phosphorus, sulfur and chlorine

Answer 8

Low metling points
because they are simple covalent structures
held with weak van der walls forces
weakest intermoelcular force
easy to overcome

Question 9

What is the melting point of Argon like

Answer 9

Very low

literally a gas at room temperature

Question 10

Explain the metling point of Argon

Answer 10

Nbole gas, single atom with full outer shell of electrons
Atom is very stable
Van Der Waals between them very weak
therefore easy to overcome at lower temperatures