covalent bonding again (same thing)
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covalent bonds are formed by non metals or metals
mon metals
non metals can share ____ with other ___ ____ atoms to obtain a ___ ______ ____
electrons non metal full outer shell
covalent bonds between atoms are very ( weak or strong)
strong
covalently bonded substances may be ____________ or _____________
simple molecular structures giant covalent structures
shared electrons are called ______ electrons and are found in ____
bonding pairs
electrons on the ____ shell which are not involved in the covalent bonds are called
non bonding electrons
whats the difference between ionic and covalent bonds
in covalent bonds the electrons are shared between the atoms, they are not transferred (donated or gained) and no ions are formed.
in a covalent bond, is the electrostatic strong or weak between the shared pair of electrons and why
the electrons are negatively charged and the nuclei are positively charged
in covalent bonds, are the electrons in a fixed position
no, they are in constant motion
what does covalent bonding do to the atom
makes it more stable
covalent bonding forms a
molecule
a single covalent bond is shown by
drawing a straight line between them H-H Cl-Cl
what is a single covalent bond
when one pair of electrons is shared
what is a double covalent bond
when 2 pairs of electrons are shared
example of an atom that has a double covalent bond
oxygen 0₂
how is a double covalent bond represented
two straight lines between the atom 0=0
What does diatomic mean
it consists of two atoms covalently bonded together
do triple bonds exist if yes give an example
yes nitrogen
how is a triple bond represented
N≡N Three lines between the atoms
what bond is the strongest (double, single or triple)
triple, it would need a lot of energy to break
why is nitrogen so unreactive ( think of bonds)
it has a triple bond which would need huge amounts of energy to break so is a very unreactive gas
covalent substances tend to have what structures
simple molecular like Cl₂ or H₂O
draw a dot and cross for : Hydrogen Chlorine Nitrogen Oxygen Hydrogen Chloride Water Ammonia Carbon Dioxide Methane Ethane Ethene
answers on save my exams
what are simple molecular compound made of
a few atoms covalently bonded together