Quick will mark
match each of the unknown ions to its appropriate description.

a− a) a nonmetal that gained one electron
b+ b) a metal that lost one electron
c2− c) a metal that lost two electrons
d2+ d) a nonmetal that gained two electrons

Metal -  form   a positively   charged ion   by  losing   valence electrons ( electron in the outermost energy level). For  example Metal D  loses 2  electrons to form D2+ ion. Non metal  form   a negatively  charged ion by  gaining one or  more electrons  in  order  to fill it's   valence   shell . For  example  non metal A gain 1 electron  to  form  A-  ion.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.