Bonding

Question 1

A ________ _________ is formed when atoms are held together by attractive forces

Answer 1

Chemical bond

Question 2

Electrons can either be _________ or __________

Answer 2

Shared Transferred

Question 3

What type of bonding takes place between Non - Metals

Answer 3

Covalent

Question 4

List some of the properties of covalent Bonds referring to melting and boiling point, flexibility, Solubility and Conductivity.

Answer 4

1. Melting and boiling points: The melting and boiling points of covalent compounds is generally lower than that for ionic compounds.
2. Flexibility: Covalent compounds are generally more flexible than ionic compounds. The molecules in covalent compounds are able to move around to some extent and can sometimes slide over each other (as is the case with graphite, this is why the lead in your pencil feels slightly slippery). In ionic compounds all the ions are tightly held in place.
3. Solubility in water: Covalent compounds generally are not very soluble in water.
4. Electrical conductivity: Covalent compounds generally do not conduct electricity when dissolved in water. This is because they do not dissociate as ionic compounds do.

Question 5

Give the definition of Ionic bonding

Answer 5

A transfer of electron from one atom to another to form a positive ion or cation.

Question 6

Give a description of metallic bonding.

Answer 6

The valence electrons of metals are weakly attracted and can be delocalised, meaning that an atom’s electrons do not stay around that one nucleus. This leaves a positive ‘ion’ surrounded by a ‘sea’ of electrons.