Bonding

Question 1

What type of ions do non metals form?

Answer 1

Negative ions

Question 2

What type of ions do metals form?

Answer 2

Positive ions

Question 3

Covalent bond

Answer 3

Non metal + non metal

Question 4

Ionic bond

Answer 4

Metal + non metal

Question 5

Metallic bond

Answer 5

Metal + metal

Question 6

What are the properties of an ionic compound? - 4 points

Answer 6

• soild at room temperature
• high melting point -> strong electrostatic forces
• when molten or aqueous can conduct electricty -> ions are free to move
• brittle and shatters when given a sharp blow -> due to contact with like charged ions

Question 7

Double covalent bond

Answer 7

2 shared pairs of electrons

Question 8

Triple covalent bond

Answer 8

3 shared pairs of electrons

Question 9

What is a dative/coordinate bond?

Answer 9

When an atom provides the shared pair of electrons in a molecule

Question 10

Properties of a simple covalent molecule - 4 points

Answer 10

• regular arrangement -> held together by van der waals
• low melting and boiling points -> weak forces of attractions
• insoluble -> mostly liquid and gas
• can not conduct electricty -> no ions or delocalised electrons

Question 11

Properties of a giant covalent bond - 4 points complete

Answer 11

• high boiling and melting points -> strong covalent bonds
• insoluble
• only graphite can conduct electricity
• hard solids

Question 12

What is a metallic bond?

Answer 12

• strong electrostatic forces
• positive ions in a sea of free/delocalised electrons

Question 13

What makes a metal stronger? - 3 points

Answer 13

• nuclei radius
• size of metal ions
• charge of metal ions/ nuclear charge

Question 14

Metallic compound properties - 4 points

Answer 14

• malleable and ductile
• good conductors of heat and electricity
• insoluble in water
• high melting and boiling temperature