When it is acted upon by an outside force
Acids: taste sour, has a pH less than 7
bases: tastes bitter, has a pH greater than 7
20 grams is probably the mass
All three of them i know i already did that
The elemental classification for oxygen would be non-metal. It is located in period number 2 and group number 16. It has an atomic number of 8. At room temperature, it exists as a gas. Hope this answers the question. Have a nice day.
