C2 Chemical bonding Flashcards
(28 cards)
what role do electrostatic forces play in the transfer of electrons in an ionic bond
involves the electrostatic attraction between a positive and negatively charged ions
which two groups are most likely to from ions
1,2
6,7
what type of ions do metals create and why
positive because they lose a negatively charged electron
what is an empirical formula of a compund
it is the formula of a compound at its most basic ratio of atoms to elements. e.g glucose is usually c6h12o6 but its empirical formula is ch20
how do you represent the charge of a compound in a drawing
put it in brackets and outside the bracket put + or - depending on how many electrons its lost
what is the definition of an ionic bond
when electrons are transfered between two elements
what type of bond is h20
ionic
what are the properties of an ionic compound
high melting point
high boiling point
cant conduct electricity
strong bonds
what is a covalent bond
when two elements share particles to gain a full outer shell
define a molecule
two or more elemetns joined by covalent bonds
in an ionic compound, how much energy is required to overcome the ionic bonds
they need a lot of energy
what is the difference between
covalent bonds and
intermolecular forces
covalent bonds are the actual bonds between two elements to form a molecule. these are strong.
intermolecular forces are the forces between two molecules, these are weak
why is o2 a gas at room temperature
intermolecular forces are week and easily broken
properties of a simple molecular structure
strong covalent bonds
weak intermolecular bonds
therfore gases or liquids at room temperature
what type of elements form covalent bonds
non metals only
what type of elements form ionic bonds
metals and non metals
do simple molecular structures form bonds and give reasoning
no bcz they arent charged
what are the uses of nanoparticles
scientific research for medicine
conduct electrcicity
cosmetics
properties of metal
conduct electricity
solid at room temperature conduct heat
what does malleable mean
can slide over each other
what is an allotrope
different stuctural forms of the same element
In terms of surface area and volume, what is special about nanoparticles
large surface area to volume ratio
what are alloys
mixture of metals that are harder than pure metals
what happens in mettalic bonding
delocalise electrons which allows room for conduction of electricty
