Question

question 25 1 pts which species have the same number of electrons as the noble gas argon? (pick all that apply) ca²⁺ o²⁻ f n³⁻ p³⁻ cl⁻ k⁺ s²⁻ al³⁺

Explanation:

Step1: Determine electrons in Argon

Argon (Ar) has 18 electrons as its atomic number is 18.

Step2: Analyze Ca²⁺

Calcium (Ca) has an atomic number of 20. Ca²⁺ has lost 2 electrons, so it has 20 - 2=18 electrons.

Step3: Analyze O²⁻

Oxygen (O) has an atomic number of 8. O²⁻ has gained 2 electrons, so it has 8 + 2 = 10 electrons.

Step4: Analyze F

Fluorine (F) has an atomic number of 9, so it has 9 electrons.

Step5: Analyze N³⁻

Nitrogen (N) has an atomic number of 7. N³⁻ has gained 3 electrons, so it has 7+ 3 = 10 electrons.

Step6: Analyze P³⁻

Phosphorus (P) has an atomic number of 15. P³⁻ has gained 3 electrons, so it has 15 + 3=18 electrons.

Step7: Analyze Cl⁻

Chlorine (Cl) has an atomic number of 17. Cl⁻ has gained 1 electron, so it has 17+ 1 = 18 electrons.

Step8: Analyze K⁺

Potassium (K) has an atomic number of 19. K⁺ has lost 1 electron, so it has 19 - 1=18 electrons.

Step9: Analyze S²⁻

Sulfur (S) has an atomic number of 16. S²⁻ has gained 2 electrons, so it has 16 + 2=18 electrons.

Step10: Analyze Al³⁺

Aluminum (Al) has an atomic number of 13. Al³⁺ has lost 3 electrons, so it has 13 - 3 = 10 electrons.

Answer:

Ca²⁺, P³⁻, Cl⁻, K⁺, S²⁻