Ionic model

Question 1

What are positive ions called

Answer 1

cations

Question 2

what is a negative ion called

Answer 2

anion

Question 3

Definition of ionic bonding

Answer 3

the force of attraction between oppositely charged species

Question 4

What type of attraction is formed between the oppositely charged ions

Answer 4

electrostatic attraction

Question 5

Why do ionic compounds have high melting points

Answer 5

electrostatic attraction between oppositely charged ions is very strong and a requires a lot of energy to overcome

Question 6

What is the charge of an ionic compound

Answer 6

neutral

Question 7

roman numerals used to show the charge of ions

Answer 7

yes

Question 8

What are the formulas for these polyatomic ions
Ammonium
Hydroxide
Nitrate
Hydrogencarbonate
Carbonate
Sulfate
Phosphate

Answer 8

NH4+
OH-
NO3-
HCO3-
CO32-
SO42-
PO43-

Question 9

What type of forces in a lattice structure

Answer 9

Electrostatic forces of attraction

Question 10

What process is lattice enthalpy

Answer 10

Endothermic (break any bonds)
(positive result)

Question 11

Properties of ionic compounds (giant ionic lattice structures) (6)

Answer 11

• Ionic compounds are strong
• They are brittle as ionic crystals can split apart
• Ionic compounds have high melting and boiling points
• Ionic compounds are not volatile
• Ionoc compounds are soluble in water
• Can conduct electricity when molten or in solution

Question 12

Out of Mg2+O2-
and Na+Cl-
what has the higher melting point

Answer 12

MGO because it has a higher charge density due to electrostatic attraction of charges

Question 13

What is a simple covalent structure melting and boiling point like ?

Answer 13

low

Question 14

What is the melting/boiling point in giant covalent structure

Answer 14

high

Question 15

Do simple covalent and giant covalent conduct electricity?

Answer 15

no

Question 16

Is simple covalent structure soft or hard

Answer 16

soft

Question 17

What are the forces like in simple covalent structure

Answer 17

weak intermolecular forces and covalent bonds within a molecule

Question 18

example of a single covalent molecule

Answer 18

BR2

Question 19

What are the forces like in a giant covalent

Answer 19

Electrons in covalent bonds between atoms

Question 20

What is an example of giant covalent structure

Answer 20

graphite , silicon oxide

Question 21

What is covalent bonding

Answer 21

electrostatic attraction between nuclei of two atoms and the electrons of their outer shells