Question

Consider the raw data generated by mass spectrometry for an element:

mass (amu)	% abundance
89.90470	100.0
90.90565	21.8
91.90504	33.3
93.90632	33.8
95.90828	5.4

1. Use the given data to calculate the average atomic mass of this element.

2. What is the symbol for this element?

3. What is the name of this element?

4. What period is this element in?

5. What group is this element in?

Answer 1

Consider the raw data generated by mass spectrometry for an element:

mass (amu)	% abundance
89.90470	100.0
90.90565	21.8
91.90504	33.3
93.90632	33.8
95.90828	5.4

1. Use the given data to calculate the average atomic mass of this element.

average atomic mass= mass * % abundance of all isomers / total number of atoms

=89.90470*100+90.90565*100+91.90504*100+93.90632*100+95.90828*100/194.3

= 46252.999 /194.3

=238.049402985 amu

2. What is the symbol for this element?

The symbol for this element is U

3. What is the name of this element?

Uranium

4. What period is this element in?

period 7

5. What group is this element in?

group n/a, f-block