Element X has 49 protons and 66 neutrons. Identify what is the name of this element, and its number of electrons.
Question
Element X has 49 protons and 66 neutrons. Identify what is the name of this element, and its number of electrons.
Solution
The element with 49 protons is Indium (In). The number of protons in an atom is also known as its atomic number, which is unique to each element.
In a neutral atom, the number of electrons is equal to the number of protons. Therefore, a neutral atom of Indium also has 49 electrons.
However, if the atom is an ion (meaning it has a charge), it may have more or fewer electrons. The question does not specify whether the atom is an ion or not, so we will assume it is neutral.
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