Question

1. your friend tells you that an element has 10 electrons. can you determine the element? if so, state the element name. if not, state what additional information you would need. 3 points

Explanation:

Step1: Consider the nature of the element

In a neutral atom, the number of electrons is equal to the number of protons (atomic number). But if the element is an ion (has a charge), the number of electrons is not equal to the number of protons.

Step2: Analyze the given information

We are only told the number of electrons. If it is a neutral atom, atomic number \(Z = 10\) (neon). But if it is an ion (e.g., \(F^-\) has 10 electrons, \(Na^+\) has 10 electrons), we cannot be sure.

Answer:

If the element is neutral, the element is neon. If it is an ion, we need to know the charge of the ion (to relate the number of electrons to the number of protons/atomic number).