Seeing these element-posts I made a list of blazons for people and places that elements are named after.

Places

Argent, six pallets gules, a chief azure - USA (Americium)

Or, a dove volant facing to the sinister Argent in its beak an olive branch vert; in base, the numbers '1960' of the second - Cyprus (Copper)

Per fess Or and azure, in chief a demi-lion issuant Or, in base a fleur-de-lys argent - Darmstadt (Darmstadtium)

Argent, issuant from a base engrailed azure a tree of the same leaved vert charged with an atom Or - Dubna (Dubnium)

Azure, three fleurs-de-lys Or - France (Francium, Gallium)

Or, an eagle displayed sable armed beaked and langued gules - Germany (Germanium)

Argent, issuant from a ford, a castle triple-towered gules masoned and ajoure sable, domed azure, with an open portcullis Or therein a knight Proper. the outer towers ensigned with a spire charged with a star, both Or, the inner tower ensigned with a moon of the same - Copenhagen (Hafnium)

Azure a lion rampant barry of ten argent and gules, armed Or - Hesse (Hassium)

Azure, the head of St Erik crowned Or - Stockholm (Holmium)

Gules, on waves of the sea in base a ship in full sail argent, a chief azure semy-de-lys Or - Paris (Lutetium)

Gules, an eagle argent, armed, crowned and beaked Or - Poland (Polonium)

Gules, a double-headed Imperial Eagle displayed, twice imperially crowned, grasping in the dexter claw an imperial sceptre, and in the sinister claw an imperial orb, all Or - Russia (Ruthenium)

People

Argent, on a bend Azure between a rose gules and crystals proper, two mullets Or - Johan Gadolin (Gadolinium)

Azure, an arrow to base within a horseshoe both argent ensigned with a cross pattee Or - Marie Curie (Curium)

Quarterly; 1st & 4th gules, an armored arm issuant from a cloud proper maintaining a sword Argent; 2nd & 3rd vert, a horseshoe below a stirrup argent strapped gules, over the four quarterings an inescutcheon azure, a cross patonce Or, 3 mullets in chief and a crescent in base argent - Dmitri Mendeleev (Mendelevium)

Per saltire arched gules and Or, two inescutcheons voided of the first in fess, within each a martlet sable - Ernest Rutherford (Rutherfordium)

Argent, on a roundel per pale serpentine gules and sable, two roundels countercharged - Niels Bohr (Bohrium)

Argent, the Kopernik house mark Sable - Nicolaus Copernicus (Copernicium)

Credits: Places from NGW and Wikipedia

People (aside from Copernicus) from http://www.numericana.com/arms/