Answer:
The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.
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Answer:
she colored in 60% of the paper blue and left 40% of the paper blank
Step-by-step explanation:
That is weird i think both answers would be the same they probably just put the same answer choice accidentally.
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Answer:
The second answer is a square obviously because of the 90 degree angles and four sides and need I say more. But I'm sorry I can't help with the first one.