Which phase change at standard temperature and pressure represents sublimation?

Substances on Earth can exist in three phases namely, solid, liquid or gas.  The phase can be changed from one to other by any of six changes of phase: melting, condensation, freezing, vaporization, decomposition or sublimation.

Chemical process in which a solid turns to a gas without going to liquid stage is known as sublimation. It is an endothermic (absorbs heat) process. For example: Transformation of dry ice (solid carbon dioxide) to vapors to form clouds.

Hence, phase change at standard temperature and pressure which represents sublimation is solid turns to a gas without going to liquid stage.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6