Module Test N5 Flashcards
Where do covalent bonds form
Between non metal atoms
When do covalent bonds form
When 2 positive nuclei are held together by their common attraction for a shared pair of electrons
What are the 7 diatomic molecules through the information of covalent bonds
Hydrogen = H2
nitrogen = N2
oxygen = O2
Fluorine =F2
Chlorine = CL2
Bromine = BR2
Iodine = I2
The shape of a simple covalent bond depends on what ?
Number of bonds
Orientation of these bonds around the central atom
What are the shapes of a simple covalent molecule
Linear
Angular
Trigonal pyramidal
Tetrahedral
What leases to double and triple covalent bonds
More than one bond being formed
What 2 structures do covalent substances form
Discrete molecular substances
Giant network structures
Describe a covalent molecular substance
Strong covalent bonds within the molecules
Weak attractions between the molecules
What causes the weak forces of attractions between the molecules to break
Change in state
(Low melting and boiling points)
Why don’t covalent substances conduct electricity
They do not have charged particles which are free to move
What kind of bonds are within a giant structure
Strong covalent bonds
When do ions form
When atoms lose or gain electrons to gain a stable electron arrangment
How do metal atoms to form positive ions
Lose electrons
How do non metal atoms gain negative ions
Gain electrons
What are ionic bonds
Electrostatic attraction between positive and negative ions
