Chemical Bonding

Question 1

What is the definition of crystal?

Accepted Answer

A regular, repeating arrangement of particles in crystaline solid

Question 2

Where are electrostatic forces found?

Accepted Answer

In Ionic and mettalic structures

Question 3

What 2 factors increase the strength of ionic bonds?

Accepted Answer

A larger the charge A smaller the ions

Question 4

What solvents dissolve ionic structures?

Accepted Answer

Any polar substance (e.g. water)

Question 5

Why do ionic structures dissolve in water?

Accepted Answer

The water molecules pull ions away from the lattice causing it to dissolve

Question 6

Why are ionic compounds brittle?

Accepted Answer

When bent, ions with like charges are pushed together causing them to repel and shatter the crystal structure

Question 7

Why are mettalic bonds malleable?

Accepted Answer

Layers sliding over eachother do not effect the delocalised electrons, so mettalic bonds remain

Question 8

Describe a Covalent bond

Accepted Answer

A chemical bond where a pair of electrons are shared between 2 atoms

Question 9

How are atoms in a covalent bond held together?

Accepted Answer

By electrostatic attraction between the nucleus of each atom and shared electrons

Question 10

What is electronegitivity?

Accepted Answer

The ability of an atom to attract the pair of electrons in the covalent bond towards itself

Question 11

What is a co-ordinate bond?

Accepted Answer

It is a covalent bond where both electrons in the bond come from just one of the atoms involved

Question 12

How are co-ordinate bonds represented?

Accepted Answer

With an arrow (->)

Alle Karten