A. Phase changing. When phase changes nothing chemically changes about the substance, its still the same thing.
I believe that the molar mass is 342.34g/mol
The pairs are:
K, Kr - Same period
Be, Mg - Same group
Ni, Tc - Both are transition metals
B, Ge - Both are metaloids
Al, Pb - Both form inert oxides
Answer:
your finger becomes negatively charged
Explanation:
