Question

mg+2 has the same number of electrons as: mg ne si which of the following would be true when comparing the following: oxygen - 14 and oxygen - 16 they have different numbers of protons they have different numbers of electrons they have different numbers of neutrons

Explanation:

First Question:

Step1: Determine electrons in \(Mg^{+2}\)

Magnesium (\(Mg\)) has an atomic number of \(12\), so neutral \(Mg\) has \(12\) electrons. \(Mg^{+2}\) has lost \(2\) electrons, so it has \(12 - 2=10\) electrons.

Step2: Determine electrons in \(Ne\)

Neon (\(Ne\)) has an atomic number of \(10\), so neutral \(Ne\) has \(10\) electrons.

Step3: Determine electrons in \(Mg\) (neutral)

Neutral \(Mg\) has \(12\) electrons (from atomic number).

Step4: Determine electrons in \(Si\)

Silicon (\(Si\)) has an atomic number of \(14\), so neutral \(Si\) has \(14\) electrons.

Second Question:

Step1: Recall isotope properties

Oxygen - 14 and oxygen - 16 are isotopes. Isotopes of an element have the same number of protons (since they are the same element, oxygen has atomic number \(8\), so \(8\) protons for both). In a neutral atom, the number of electrons equals the number of protons, so they have the same number of electrons (\(8\) each if neutral).

Step2: Calculate neutrons

The formula for the number of neutrons \(n\) is \(n = A - Z\), where \(A\) is the mass number and \(Z\) is the atomic number. For oxygen - 14 (\(A = 14,Z = 8\)), \(n=14 - 8 = 6\). For oxygen - 16 (\(A = 16,Z = 8\)), \(n=16 - 8=8\).

Answer:

First Question: Ne
Second Question: they have different numbers of neutrons