Question

A very disorganized scientist has lost track of some data from a recent experiment and can no longer determine what element she was working with. Now, she refers to it as element X. She knows the element has a smaller atomic radius than strontium, a larger ionization energy than phosphorus, and a smaller electronegativity than chlorine. What is the likely identity of element X?

Answer 1

Answer :                                                                                                                      

   The element X which ha a smaller atomic radius than strontium , a larger ionization energy  than phosphorous , and a smaller elctronegativity than chlorine is Nitrogen

Explanation:

 Here are some properties of Nitrogen-

• Atomic number of Nitrogen is 7
• Atomic mass of nitrogen is 14.0067 g.mol -1
• Nitrogen is a popular non-metal gas that is usually colourless, odourless, tasteless and often diatomic. In its outer shell, it has five electrons, but in most compounds, it is trivalent.  
• Applications-
• In the manufacture of ammonia, the greatest single commercial use of nitrogen is as a part, subsequently used as fertilizer and to produce nitric acid.  
• Liquid nitrogen (often referred to as LN2) is used as a refrigerant for the freezing and transport of food items, for the protection of bodies and for the reproduction of food products. Nitrogen is a constituent in all living tissues and comprises 78 percent of the Earth 's atmosphere. Nitrogen, since it is a component of DNA and, as such, is part of the genetic code, is an integral element of life.

Hence , the X element is NITROGEN.