Answer:
Elements in the same group in a periodic table have similar chemical properties.
The average atomic mass of this new element X is 43.45
HOW TO CALCULATE AVERAGE ATOMIC MASS:
- The average atomic mass of an element can be calculated by the following steps:
- multiplying the atomic mass of each isotope with its relative abundance
- Then sum the results for each isotope
According to this question; a new element X is found and in the sample:
- 70% is X-43
- 25% is X-44
- 5% is X-47
The average atomic mass of element X is calculated thus:
X-43: 70/100 × 43 = 30.1
X-44: 25/100 × 44 = 11
X-47: 5/100 × 47 = 2.35
Next, we sum the results as follows:
= 30.1 + 11 + 2.35
= 43.45
- Therefore, the average atomic mass of this new element X is 43.45.
Learn more: brainly.com/question/13753702?referrer=searchResults
Answer:
its not A B or C soo choose D *This is what i think*
