What do the following name and words have in common?

TINA
LIFE
RANI
NEAR
SNAG
AURA

HINT:
It has to do with upper and lower case letters.

Answer:

Each four-letter word can be written as two letter pairs, alternating capital and small letters, in the form of chemical element symbols:

TiNa (Titanium - Sodium)
LiFe (Lithium - Iron)
RaNi (Radium - Nickel)
NeAr (Neon - Argon)
SnAg (Tin - Silver) 
AuRA (Gold - Radium)

Credit: NPR Weekend Edition Sunday Puzzle
November 20, 2005
Will Shortz
Idea and LIFE/NEAR/LINE/FEAR (Word Square)