Question

which element have the electronic configuration ns2 np6 in their outer most orbit ?
a) alkali metals
b) transition metals
c) noble gases
d) inner tradition metals​

Answer 1

Explanation:

The element present in the 18th group (except Helium(He) has the general electronic configuration ns2np6. The elements of the 18th group are called noble gas, having 8 electrons in valence shells, and their outer shells are filled with valence electrons, making them very stable.

a ) The alkali metals are so named because when they react with water they form alkalies. Alkalies are hydroxide compounds of these elements, such as sodium hydroxide and potassium hydroxide. Alkalies are very strong bases that are caustic. Lye, for example, is sodium hydroxide. Alkalies react with acids to form salts.

b). Group B metals are referred to as transition metals. They are located in the middle of the periodic table between Group IIA and Group IIIA. ... The most common transition metals include chromium, manganese, copper, iron, coblat, zinc, silver, mercury and gold.

c). The science. The noble gases, in order of their density, are helium, neon, argon, krypton, xenon and radon. They are called noble gases because they are so majestic that, in general, they don't react with anything. For this reason they are also known as inert gases.

d) The period 7 inner transition metals (actinides) are thorium (Th), protactinium (Pa), uranium (U), neptunium (Np), plutonium (Pu), americium (Am), curium (Cm), berkelium (Bk), californium (Cf), einsteinium (Es), fermium (Fm), mendelevium (Md), nobelium (No), and lawrencium (Lr).

Answer 2

c) noble gases have electronic configuration ns2 np6 in their outer most orbit.

• Noble gases are present in last column of periodic table which is group 18.
• They are inert in nature due to their completely filled octet.
• Alkali metals are present in first group of periodic table.
• Transition elements are present in group 3 to group 12 and they are d-block elements.
• Inner transition elements are f-block elements further categorized into lanthanide and actinide series.