Answer:
Due to presence of a triple bond between the two N−atoms, the bond dissociation enthalpy (941.4 kJ mol
−1
) is very high. Hence, N
2
is the least reactive.
Heterogenous mixtures can separates due to differences in size of components
Explanation:
group 8 elements don't react with other elements because they are noble element which means that they can't lose or gain electron.
The answer would be mesons.
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Changes in phase from solid to liquid (melting) and from liquid to gas (boiling) require energy. When solid ice melts and becomes a liquid, the particles of the substance move farther apart and heat energy is gained. When water boils, if forms steam (a gas).
