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 <u>Nitrogen</u>
Explanation:
<u> Here are some properties of Nitrogen- </u>
- <u>Atomic number of Nitrogen</u> is 7
- <u>Atomic mass of nitrogen</u> 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.
- <u>Applications- </u>
- 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.
Answer is: Louis Pasteur (1822-1895) disproved spontaneous generation. He boiled liquid with proteins and other nutrients in S-neck flasks and regular flask to kill all microorganism present. In regular flask liquid showed changes when exposed to air and in S-neck flack there was no change (microorganism can not getting in the flask because the S- neck). When he removed S-neck, liquid changed because microorganisms came in liquid.
Pasteur showed it was not the air itself but particles within the air that had microorganisms.
Answer:
There are 18 groups in total on the periodic table
Answer:
received energy from water
The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.