Bonding!

Question 1

What are the three main types of bonding?

Answer 1

Covalent: 2 Non-metals, electrons are shared
Ionic: Metal + Non-metal, electrons are transferred, ions
Metallic: Between the atoms in a metal

Question 2

Another name for the Electron dot system.

………….. Structures

Answer 2

Lewis Structures

Question 3

(Covalent bonding) Between how many valence electrons does an atom have if it wants to give away electrons?
And share electrons?

Answer 3

Give away: 1-3 Valence electrons

Share: 4-7 Valence electrons

Question 4

What is the definition for a chemical bond?

Answer 4

A chemical bond is the physical process that causes atoms and molecules to be attracted to each other and held together in a more stable chemical compound.

Question 5

(Ionic bonding) Metal ………… the electron and becomes ………..
The non-metal ………….. the electron and becomes ………….

Answer 5

Metal: gives away electron and becomes positive (+ion)

Non-metal: Gains the electron and becomes negative (-ion)

Question 6

(Ionic bonding) After the reaction the ions are held together to form a ……….. …………… as a result of ………………….. forces of attraction.

Answer 6

Crystal lattice

electrostatic forces

Question 7

(Metallic bonding) Metals have …………. valence electrons that are ………….. attracted to the nucleus. These electrons are …………. from the nucleus and form a …………… ……………

Answer 7

Few
Weakly
Dislodged
Negative region (Also known as the sea of delocalised electrons)

Question 8

(Metallic bonding) T/F
The electrons are free flowing.
All the atoms are negatively charged.
Electrons are transferred to other metals atoms.

Answer 8

Electrons free flowing: Yes
Atoms all negatively charged: No, the atoms are all positively charged
Electrons transferred to other metals atoms: No, e- free flowing and stay within same metal.

Question 9

Covalent bonds form a ………….

Ionic bonds form ………….

Answer 9

Covalent: Molecule
Ionic: Compounds

Question 10

Covalent bonds: Ram1+ Ram2= …………… mass
Ionic bonds: Ram 1+ Ram2= ………………. mass

(Ram = Relative atomic mass)

Answer 10

Covalent bonds: Molecular mass

Ionic bonds: Formula mass

Question 11

What in an atom is responsible for bonding?

Answer 11

Just valence electrons!

Question 12

Which elements don’t bond?

Answer 12

Noble gasses

Question 13

Explain the difference between a single, double and triple covalent bond.

Answer 13

Single covalent bond: two e- and two atoms.
Double covalent bond: four e- and two atoms.
Triple covalent bond: six e- and two atoms.

Question 14

What is the term for this definition.

The number of electrons in the outer shell of an atom which are able to be used to form bonds with other atoms.

Answer 14

Valency

Question 15

What are some properties of covalent compounds?

Answer 15

Lower melting and boiling points.
More flexible than ionic compounds.
Generally not very soluble.

Question 16

Properties of Ionic compounds?

Answer 16

Ions are arranged in a lattice structure.
Ionic solids crystalline at room temperature.
Often hard (strong electrostatic attraction) and brittle.
High melting and boiling points.
Solid ionic crystals don’t conduct electricity but ionic solutions do.

Question 17

(Metallic)
Valence e- are dislodged (…………..) Another word for dislodged?
Another name for positive atomic nuclei?

Answer 17

Delocalised

Atomic kernels

Question 18

Properties of metals?

Answer 18

Shiny.
Conduct electricity.
Conduct heat.
High melting point. (Strong bonds) 
High density. (Tight packing of the nuclei)