If an isotope of an element has 33 neutrons and a mass number of 64, how many electrons must it have?
2 answers:
The mass number is the sum of the protons and neutrons
Answer:
The isotope must have 31 electrons
Explanation:
Mass number = (number of neutrons)+(number of protons) Here, mass number of element is 64 and number of neutrons is 33 So, number of protons i the element = (mass number)-(number of neutrons) = (64)-(33) = 31 Isotope of an element remain present in neutral form. So, number of protons should be equal to number of electrons in that isotope. Because proton has +1 charge and electron has -1 charge So, the isotope must have 31 electrons.
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Explanation:
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2.0 moles of hydrogen gas react with 1.0 mole of oxygen gas to produce 2.0 moles of water vapor in presence of Pt as a catalyst.
Answer: i think its the thired one
Explanation:
A.
