Physical Chemistry : Atomic Nucleus
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Example Question #1 : Atoms And Elements
How many neutrons are present in the nucleus of one atom of 
From the periodic table, we find that the atomic number, i.e., the number of protons in the nucleus of 
Example Question #1 : Atomic Nucleus
Which atomic symbol represents a period five transition metal that has 42 electrons when it forms a 
Transition metals extend from groups 3 through 12 and periods 4 through 7. Ru, in its neutral state, has 44 electrons. Therefore, when it becomes a 
Example Question #91 : Physical Chemistry
What is the mass number, atomic number, and charge, of the isotope of an atom that contains 34 protons, 36 neutrons, and 36 electrons?
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The atomic number is equal to the number of protons in the element, so from the periodic table, we find that the element with atomic number 34 is selenium. Since 
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