Question

An element X has eight electrons in the outermost shell. The element X behaves as

a) metal b) non-metal

c) inert gas d) metalloid


3 moles of oxygen atom contains

a) 18.066 x 10 24 atoms

b) 36.132 x 10 23 atoms

c) 12.044 x 1024 atoms

d)18.066 x 10 23 atoms​

Answer 1

Answer:

c) Inert gas : It behaves as a inert gas because it 's outermost shell is complete.

Answer:

d)18.066×10 ²³ atoms

As we know ,

the value of Avogadro Number– 6.022×10²³ atoms

and we have given the no of moles of o² is 3 moles,

so , 3 moles of 02 contains → 3× 6.022×10²³

→ 18.066×10²³ atoms