Answer:
Calcium
Explanation:
The symbol for the element with a mass number of 27 is actually Al for Aluminum instead of Co for Cobalt. Mass number refers to atomic mass, not atomic number.
Aluminum has an atomic mass of 26.982 or 27.
The letters to unscramble are I, M, C, Al, U, and C.
The mystery element is Calcium.
Hope that helps.
Answer:
51.51 amu .
Explanation:
The atomic mass 52 amu has percentage of 79.5%
The atomic mass 49 amu has percentage of 8%
The atomic mass 50 amu has percentage of 12.5 %
Average atomic pass will be weighted average of their atomic weights
= 52 x .795 + 49 x .08 + 50 x .125
= 41.34 + 3.92 + 6.25
= 51.51 amu .
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