Matter Flashcards
Another name for charged molecules
an ion
atoms that have gained or lost neutrons
isotopes
these subatomic particles are about the same size as electrically positive subatomic particles
neutrons
these move about the centre of an atom at a great distance
electrons
atoms that have gained or lost electrically negative subatomic particles
ions
these are formed when atoms link or bond together
molecules
the number if these particles determines atomic identity
protons
a term used to describe elements that share both metallic and non-metallic properties
metalloids
the energy needed to remove a valence electron from a neutral atom
ionization energy
these types of elements tend to be poor insulators of heat and electricity
non-metals
these elements, in general, tend to spontaneously gain valence electrons
metals
the ability of neutral atom to attract additional electrons
electron affinity
the term used to describe atoms of different elements that have the same electron configuration
isoelectronic
p
#e
#n
atomic number
atomic number
mass number
group 1A
- alkhali/atomic metals
- reacts violently in water
- reactivity increases down
