Chapter 3 : Ionic Bonding Flashcards Preview

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Flashcards in Chapter 3 : Ionic Bonding Deck (16):
1

Common polyatomic ions

Carbonate - CO3^2-
Sulfate SO4^2-
Ammonium - NH4^+
Phosphate - PO4^3-
Hydroxide - OH^-
Nitrate - NO3^-

2

-ide

S^2-
N^3-
P^3-

3

-ite

SO3^2-
NO2^2-
PO3^3-

4

-ate

SO4^2-
NO3^-
PO4^3-

5

Ionic bonding

When metallic atoms combine with non metallic atoks to form an ionic lattice
The transfer of electrons from a metal to a non-metal

6

Why do elements lose gain or share electrons?

To acheive stability of noble gases

7

Cation

An atom that has lost electrons to become stable and therefore positively charged
Metals

8

Anion

An atom that has gained electrons to become stable and therefore negatively charged
Non - metals

9

General name for an ionic compound

Salt, the substance formed when a metal and a non metal react together

10

Ionic lattices

Form crystals, 3D arrangement of metals and non metals
Held together by electrostatic attraction
Neutrally charged and contains enough anions and cation to balance

11

Properties of ionic compounds

High melting/boiling points
Do not conduct electricity in solid
Hard
Dissolve in water
Conduct electricity in molten/aqueous state(electrolytes)
Brittle

12

Why have ionic compounds got high melting/boiling points?

The electrostatic attraction is very strong and it takes a lot of energy to separate the ionic compounds

13

Why does an ionic compound conduct in a molten/aqueous state but not solid?

To conduct a substance must contain free floating charged particles to make an electrical current and when dissolved in water or molten the ions are free flowing

14

Why are ionic compounds hard?

Due to the electrostatic attractions which holds together strongly

15

Why are ionic compounds brittle?

When something hits an ionic substance the lattics is moved and alike charges line up and repel each other therefore shattering

16

Hydrated ionic compounds

When ionic compounds are also bonded to hydrates or water molecules and wehn heated these decompose