chapter 2: reaction types Flashcards
if a chemical goes dark red when universal indicator is added it is very …
acidic
ion
charged atom
can be positively or negatively charged
anion
negatively charged ion
cation
positively charged ion
compound
chemically bonded
‘stuck together’
electron
a negatively charged, sub atomic particle
—> we have three •protons (+)
• neutrons (nil)
• electrons (-)
neutron
a neutral/ no charge, subatomic particle
proton
a positively charged subatomic particle
ductile
is used to make wire
lustrous
shiny
malleable
can bend and hammer it
indicator
a substance that measures PH by changing colour
polyatomic
containing more than one atom
atom
the fundamental building block and all materials
it consists of a cluster of subatomic particles
atomic symbol
a shorthand notation for describing an atom
Crystal lattice
a grid like structure of atoms Igor ions in which each particle is bonded to all of its neighbouring atoms
electron cloud
the region of negative charge surrounding the nucleus
electron shell
part of the electron cloud
a layer that surrounds the nucleus and can only hold a certain number of electrons
mass number
the number of protons and neutrons in an atom
neutral
having no overall charge
subatomic particles
particles - the smaller particles that atoms are made of
polymer
multiple atoms put together in a chain like structure
base
PH lever is higher than 7, blueish, colour, contains OH ions
half- life
the time it takes for a radioactive atom to lose half of its nucleus (decay) is its half life
