Enter the Chemical Symbol of the Element in the Blank

question 51

Short Answer

Enter the chemical symbol of the element in the blank.
An element has the following electron arrangement.
shell 1:2 electrons shell 2:8 electrons shell 3:18 electrons shell 4:18 electrons shell 5: 4 electrons
The reactivity of this element would most closely resemble that of which element?
Chemical symbol:
_____________________

---

Definitions:

Medical Advice

Guidance provided by health care professionals to patients regarding diagnosis, treatment, and management of medical conditions.

Sleeper Effect

A delayed increase in the impact of a message that occurs when an initially discounted message becomes effective, as the discounting cue is forgotten over time.

Persuasive Message

A communication intended to influence the attitudes, beliefs, or behaviors of others through various means, including logic and emotion.

Conditioned Response

A learned reaction to a previously neutral stimulus that has become associated with an unconditioned stimulus through conditioning.