Multiple Choice
The element X has three naturally occurring isotopes.The masses (amu) and % abundances of the isotopes are given in the table below.The average atomic mass of the element is ________ amu.
A) 52.62
B) 56.14
C) 55.70
D) 55.40
E) 55.74
Correct Answer:

Verified
Correct Answer:
Verified
Q8: The following hypothetical element : <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB1194/.jpg"
Q9: When a metal and a nonmetal react,the
Q10: The formula of the carbonate ion is
Q11: Which one of the following basic forces
Q12: In the symbol below,X = _. <img
Q14: Which one of the following molecular formulas
Q15: Oxygen forms an ion with a charge
Q16: Which element is found in Period 2
Q17: Which species below is the chromate ion?<br>A)Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup><br>B)CrO<sub>4</sub><sup>2-</sup><br>C)CH<sub>3</sub>COO<sup>-</sup><br>D)CO<sub>3</sub><sup>2-</sup><br>E)None
Q18: In the symbol below,x is _. <img