2D - Bonding and Structure definitions Flashcards Preview

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Flashcards in 2D - Bonding and Structure definitions Deck (20):
1

Ionic bonding

The electrostatic attraction between oppositely charged ions

2

Colavent bond

The strong electrostatic force of sttraction between a shared pair of electrons and the nuclei of the bonded atoms

3

Lone pair

An outer shell pair of electrons that is not involved in chemical bonding

4

Dative covalent bond

A shared pair of electrons which has been provided by one of the bonding atoms only

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5

The average bond enthalpy

The average enthalpy change that takes place when breaking by homolytic fission 1 mol of a given type of bond in the molecules of a gaseous species

6

Heterolytic fission

The breaking of a covalent bond with both of the bonded atoms going to each atom, forming a cation (positive ion) and an anion (negative ion)

7

Homolytic fission

The breaking of a covalent bond with one of the bonded electrons going to each atom, forming 2 radicals 

8

Metallic bonding

The electrostatic force of attraction between positive metal ions and delocalised electrons

9

Malleable

You can shape it

10

Ductile

You can draw it through wires

11

Alloy

Purpose of them?

A mixture of metals

They're a mixture of atoms of different sizes. It means that they can't move as freely against each other (thus making them tougher)

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12

Electronegativity

A measure of the attraction of a bonded atom for the pair of electrons in a covalent bond

13

Polar covalent bond

A covalent bond which has a permanent dipole

14

Polar molecule

A molecule which has a permanent dipole 

15

Ion

A positively or negatively charged atom or a (covalently bonded) group of atoms (a polyatomic ion), where the number of electrons is different to the number of protons

16

Non-polar

With no charge seperation across a bond or in a molecule

17

Simple molecular lattice

A 3 dimensional structure of molecules, bonded together by weak intermolecular forces

18

Giant covalent lattice

A 3 dimensional structure of atoms, bonded together by strong covalent bonds

19

Giant ionic lattice

A 3 dimensional structure of positively charged ions, bonded together by strong ionic bonds

20

Giant metallic lattice

A 3 dimensional structure of positive ions and delocalised electrons, bonded together by strong metallic bonds