QQuestionChemistry
QuestionChemistry
"In the element helium, how many protons, neutrons, and electrons are there?
Protons: 2
Neutrons: 2 (assuming the most common isotope, Helium- 4)
Electrons: 2
Element: He (Helium)
Atomic Mass: 4.002602"
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Answer
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Step 1:: Determine the number of protons in helium.
In an element, the atomic number is equal to the number of protons. For helium, the atomic number is 2. Therefore, there are 2 protons in a helium atom. \boxed{\text{Number of protons} = 2}
Step 2:: Determine the number of neutrons in helium.
The number of neutrons in a nucleus is called the neutron number. Since we are assuming the most common isotope, Helium- 4, the neutron number is also 2. \boxed{\text{Number of neutrons} = 2}
Step 3:: Determine the number of electrons in helium.
A neutral atom has equal numbers of protons and electrons. Since there are 2 protons in a helium atom, there are also 2 electrons. \boxed{\text{Number of electrons} = 2}
Step 4:: Identify the element symbol for helium.
The element symbol for helium is He. \boxed{\text{Element symbol} = \text{He}}
Step 5:: Determine the atomic mass of helium.
The atomic mass of an element is the average of the masses of its isotopes. For helium, the atomic mass is approximately 4.002602 u (unified atomic mass units). \boxed{\text{Atomic mass} = 4.002602 \text{ u}}
Final Answer
For helium, - Number of protons: 2 - Number of neutrons: 2 (assuming Helium- 4) - Number of electrons: 2 - Element symbol: He - Atomic mass: 4.002602 u
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