An element has the following electron configuration: 1s²2s²2p⁶3s²3p⁵

1) What is this element?

2) How many valence electrons does this element have?

3) What charge do you expect for an ion from this element?

4) This element can form an iomic compound with magnesium. What is the formula and the name of this compound?

5) Give one example of another element with the same number and type of valence electrons.

Question

An element has the following electron configuration: 1s²2s²2p⁶3s²3p⁵

1) What is this element?

2) How many valence electrons does this element have?

3) What charge do you expect for an ion from this element?

4) This element can form an iomic compound with magnesium. What is the formula and the name of this compound?

5) Give one example of another element with the same number and type of valence electrons.

| General Chemistry 1

Accepted Answer

1) Chlorine Cl.

2) 7 valence electrons (3s²3p⁵).

3) -1. It needs one electron to fill the p block and have the same electron configuration as argon.

4) Mg ⇒ Mg²⁺ and Cl ⇒ Cl^-

The formula of the ionic compound is MgCl₂ (magnesium chloride).

5) All the halogen atoms have the same number and type of valence electrons: F, Br, I

Final - Question 6 | General Chemistry 1