C1 Particles Flashcards
what is a PHYSICAL CHANGE?
substance remains unchanged
easily reversed
what is a CHEMICAL CHANGE?
new substance made
not easily reversed
what is an ELEMENT?`
pure
one type of atom
what is a MOLECULE?
pure
two/more different/same types of atom
chemically bonded
what is a COMPOUND?
pure
two/more different types of atoms
chemically bonded
what is a MIXTURE?
impure
two/more different types of atoms
mixed
what are the characteristics of METAL?
conduct heat/electricity
a range of melting points
malleable
shiny
what are the characteristics of NON-METAL?
don’t conduct heat/electricity
generally low melting points
brittle
dull
what is the ATOMIC NUMBER?
proton = #electron
what is the MASS NUMBER?
proton + #neutron
what is an ISOTOPE?
same #proton
different #neutron
why do isotopes have the same properties and chemical behavior?
same #electrons on the outer shell
