memorize definations Flashcards
memorize
contact forces
normal contact f
frictional f
viscous f (drag f)
air-resistance
non-contact forces
gravitational force
weight
sl unit of force
newton
equation of force
F=mg
equation of pressure
P=F/A
definition of mass
sl unit
measure of the amount of substance in a body
(kg)
definition of weight
sl unit
gravitational force by earth on a body placed on earth
(N)
definition of electrostatic force
attraction between unlike charges, repulsion between like charges
newton’s first law
‘mass is not gained or lost in a chemical reaction. Therefore, the total mass of the products must be the same as the total mass of the reactants.’
‘a body will remain in its state of rest or uniform motion in a straight line unless acted upon by a resultant force’
definition of pressure
the amount of force acting perpendicularly on a unit area
ionic bond
covalent bond
acid
alkali
ionic bond: strong…between oppositly charged ions
covalent bond: electrostatic forces of attraction btwn a shared pair of electroms and positively charged nuclei of both atoms in the bond
acid: produces hydrogen ions H+
alkali: hydroxide ions, OH-
neutralisation
acid-metal reaction
acid-carbonate reaction
combustion
incomplete combustion
thermal decomposition
electrolysis
oxidation
reduction
combustion
how does ionic bond occur
metal atom loses electron to form positively charged ions while non-metal atom gain electron to form negatively charged ions to achieve a stable noble gas configuration
how does covalent bond occur
atoms of non-metal react to achieve noble gas structure by sharing valence electrons
