QQuestionChemistry
QuestionChemistry
What element has 7 neutrons, 7 protons, and 7 electrons?
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Answer
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Step 1:
First, let's identify the atomic number and the mass number of the element. The atomic number is the number of protons in an atom, which is 7 in this case. The mass number is the sum of the number of protons and neutrons, which is also 7 + 7 = 14.
Step 2:: The atomic number is n_{atomic} = 7
Step 2: The mass number is $$A = 14
Step 3:
It is the element with the symbol $$^7_3\text{Li}$$, which is Lithium.
Now, we can use the periodic table to find the element with an atomic number of 7. Since the problem states that the element has 7 electrons, it must be in its neutral state, and the number of protons and electrons must be equal.
Step 4:: The element is Lithium (Li).
Step 5:
We are given that the element has 7 neutrons. However, the number of neutrons in a neutral atom can vary. For Lithium, it can have 3, 4, or even 5 neutrons in stable isotopes. But in this case, we are specifically looking for an element with 7 neutrons.
Step 6:: The isotope of Lithium with 7 neutrons is ^7_{3}\text{Li}^*, where the asterisk (*) denotes an unstable isotope.
Final Answer
Note that this specific combination of 7 neutrons and 7 protons does not exist in nature as a stable isotope.
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