A neutral isotope has 49 neutrons and 36 electrons. Identify the element symbol of this isotope and determine the mass number and number of protons.

Question

element symbol:

mass number:

number of protons:

Answer 1

Since the isotope is neutral, this means the number of electrons and protons must be equal. Thus, this element has 36 protons. The number of protons identifies the element. So this element is KRYPTON (Kr).

Element symbol = Kr

mass number = 49 + 36 = 85

number of protons = 36