The answer depends on what is meant by "normal phase".
At normal pressure, any temperature above 165.051 K.
It is a gas.
noble gas
It is at room temperature.
At 101.325 kPa, the melting point of xenon is 161.40 K or -111.75 °C or -169.15 °F. At 101.325 kPa, the boiling point of xenon is 165.051 K or -108.099 °C or -162.578 °F. It is a Gas in normal phase or at STP.
Xenon is a noble gas and an element and thus single phase
Xenon is an element in the 18th group of the periodic table, these elements are also known as the 'noble gases'.At RTP (Room Temperature and Pressure) all of the elements in this group are Gas
At room temperature, Xenon turns into a gas.
It is a gas.
Xenon (Xe) is a nonmetalic gas. it has the atomic number of 54 with the atomic mass of 131.239.
Xenon is a gas which does not say anything, so there is no particular phrase.
At normal temperature and pressure, xenon is a gas and so not particularly hard!