Question

using the table, what is the number of electrons in the aluminium ion? * (0.5 points)
element standard atomic notation atomic mass atomic number number of protons number of electrons number of neutrons charge
magnesium
calcium ₂₀⁴¹ca
fluorine 19 -1
phosphorous ₁₅³¹p³-
sulfur 31
oxygen 8 -2
potassium ₁₉³⁹k⁺¹
argon 40
boron 5 0
hydrogen ₁³h
68 98 +6
120 50 +4
7 10 13
₁₃²⁷al³+

Explanation:

Step1: Recall electron - proton relationship in ions

In a neutral atom, the number of electrons equals the number of protons. For an ion, the charge indicates the gain or loss of electrons. A positive charge means electrons are lost.

Step2: Determine the atomic number of aluminium

The atomic number of aluminium (Al) is 13, which means a neutral Al atom has 13 protons and 13 electrons.

Step3: Analyze the charge of the aluminium ion

The aluminium ion is \(Al^{3 +}\), which has a charge of + 3. This means it has lost 3 electrons.

Step4: Calculate the number of electrons in the aluminium ion

The number of electrons in \(Al^{3+}\) is \(13 - 3=10\).

Answer:

10