Multiple Choice
The mass number is equal to
A) the sum of the sum of the electrons and protons.
B) the sum of the sum of the neutrons and electrons.
C) the sum of the number of protons,neutrons,and electrons.
D) the sum of the number of protons and neutrons.
Correct Answer:
Verified
Correct Answer:
Verified
Q3: An atom of <sup>131</sup>Xe contains _ electrons<sub>.</sub><br>A)131<br>B)185<br>C)77<br>D)123<br>E)54
Q4: Which of the following elements is a
Q6: Which of the following elements is a
Q8: Which of the following elements is not
Q11: What element is defined by the following
Q18: Why do the isotopes of the same
Q32: What group of elements in the periodic
Q33: Describe the difference between ions and isotopes.
Q68: Cesium belongs to the _ group of
Q151: What is the chemical symbol for copper?<br>A)Co<br>B)Cr<br>C)Cu<br>D)C