An isotope of the element Manganese (Mn) has an atomic number of 25 and a mass number of 55. Assuming the atom is neutral, this means it has
A) 55 protons, 55 electrons, and 25 neutrons
B) 25 protons, 25 electrons, and 30 neutrons
C) 25 protons, 30 electrons, and 25 neutrons
D) 25 protons, 25 electrons, and 55 neutrons
B
You might also like to view...
From a fracture mechanics viewpoint, the reason freshly drawn glass fibers are stronger than window glass is that window glass has _________ that decrease its strength.
Fill in the blank(s) with the appropriate word(s).
A camera with changeable lenses produces an image of an object that is 3.0 mm wide on the film when the 50.0 mm lens is used. When the 135 mm lens is used, how wide is the image of the object on the film?
A. 3.0 mm B. 85 mm C. 4.5 mm D. 0.37 mm E. 8.1 mm
Why did Hubble conclude the universe must be expanding?
What will be an ideal response?
What is the inductance of a series RL circuit in which R = 1.0 K? if the current increases to one-third of its final value in 30 ?s?
a. 74 mH b. 99 mH c. 49 mH d. 62 mH e. none of the above