When sodium and fluorine combine to produce the compound NaF, the ions formed have the same electron configuration as atoms of argon, only

2.

neon, only

3

both argon and neon

neither argon nor neon

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the maximum mass of nh3 is nh3 in grams