chemical bonding 🤝

Question 1

ionic compound melting point explanation

Answer 1

___ has a giant ionic compound. large amount of energy is required to overcome strong electrostatic forces of attraction between oppositely charged ions. ___ has a high melting point

Question 2

ionic compound electricity conduction explanation

Answer 2

in solid state, oppositely charged ions are held in fixed positions by strong electrostatic forces of attraction. ions are not free moving to conduct electricity
in molten/aqueous state, strong electrostatic forces of attraction have been overcome. the ions are free moving to conduct electricity

Question 3

covalent compound melting point explanation

Answer 3

___ has a simple molecular structure. small amount of energy is required to overcome weak intermolecular forces of attraction. ___ has a low melting point

Question 4

covalent compound electricity conduction explanation

Answer 4

___ has a simple molecular structure. there are no free-moving electrons available to conduct electricity

Question 5

define electronegativity

Answer 5

the ability of an atom to attract a shared pair of electrons towards itself in a covalent bond

Question 6

what is the most electronegative atom?

Answer 6

fluorine

Question 7

define allotropes

Answer 7

different forms of the same element

Question 8

structure of diamond

Answer 8

diamond has a giant molecular structure. each carbon atom is covalently bonded to four other carbon atoms in a tetrahedral arrangement

Question 9

structure of graphite

Answer 9

graphite has a giant molecular layered structure. each carbon atom is covalently bonded to three other carbon atoms in a hexagonal arrangement. layers of carbon atoms are held together by weak intermolecular forces of attraction

Question 10

diamond/graphite high melting point explanation

Answer 10

diamond/graphite has a giant molecular structure. large amount of energy is required to break strong covalent bonds between carbon atoms. ___ has a high melting point

Question 11

diamond electrical conductivity explanation

Answer 11

giant molecular structure. all four valence electrons of each carbon atom are involved in covalent bonding. there are no free moving electrons to conduct electricity

Question 12

graphite electrical conductivity explanation

Answer 12

giant molecular layered structure. only three out of four valence electrons are involved in covalent bonding. free moving electrons to conduct electricity

Question 13

what is diamond hard?

Answer 13

all carbon atoms are held by strong covalent bonds throughout the structure

Question 14

why is graphite soft and slippery?

Answer 14

layers of carbon atoms are held together by weak intermolecular forces of attraction. layers of carbon atoms can slide over one another when a force is applied

Question 15

metal melting point explanation

Answer 15

___ has a giant metallic structure. large amount of energy is required to overcome strong electrostatic forces of attraction between positive metal ions and the “sea” of free-moving valence electrons. ___ has a high melting point

Question 16

metal electrical conductivity explanation

Answer 16

giant metallic structure. there is a “sea” of free-moving electrons available to conduct electricity

Question 17

why are metals malleable?

Answer 17

giant metallic structure. metal ions are arranged orderly in layers. when a force is applied, layers of metal ions can slide over one another