accepts 2 electrons

gives 1 electron

gives 2 electrons

accepts 1 electron

The first two bonding electrons form this bond

This bond is stronger than the other type of covalent bond

Between two atoms, there can be maximum 3 of this type of covalent bond

These bonds can be found above & below+ in front of & behind the other type of bond

dative covalent bond

sigma bond

delocalized bond

pi bond

These are fictive structures, none of them describe the true structure perfectly

They are required when only one Lewis-dot structure is not enough to describe the structure

The actual structure of a molecule is the subtraction of these resonance forms

The actual sturcture of a molecule is called resonance hybrid

negatively charged

positively charged

neutral

their charge depends on the circumstances

Atoms would like to achieve the noble gas electron configuration

Atoms form bonds with each other to be more stable

A molecule can contain more than two atoms

A molecule cannot contain only one type of atoms

It can be found between ions

If the EN difference < 2.1 between two atoms, this bond can form

This is the primary bond between K and Br.

This is the primary bond between F and Fr.

1

2

3

0

A metal kernel contains the nucleus and two electrons in every cases

It is formed between ions.

Metal kernels are surrounded by delocalized electrons.

Metal kernels can be represented by negative symbols.