Answer:
24.309
Explanation:
Let A, B, and C represent the three isotopes.
For isotope A:
Mass number = 23.99
Abundance = 78.99%
For isotope B:
Mass number = 24.99
Abundance = 10.00%
For isotope C:
Mass number = 25.98
Abundance = 11.01%
Atomic mass of Mg =?
Atomic mass = [(Mass of AxA%)/100] + [(Mass of BxB%)/100] + [(Mass of CxC%)/100]
Atomic Mass = [(23.99x78.99)/100] + [(24.99x 10)/100] + [(25.98x11.01)/100]
Atomic number = 18.950 + 2.499 + 2.860
Atomic mass of Mg = 24.309
Answer:
Give any two application for isotopes
Isotopes of iodine are used for radiotherapy in treatment of hyperthyroidism, cancer, etc.
Uranium, Radium, Polonium isotopes are used in atomic reactors.
Cobalt isotopes are used for irradiation of food products.
Answer:
Its C!
Explanation:
NH3 and OH- are both a Brønsted-Lowry base, while H2O and NH4 are acids!
Hope this helped!
