Question

Three elements A,B and C have atomic numbers 9,11 and 10 respectively. State which one is (1) a metal (2) a non metal (3) an insert gas.

Answer 1

Answer:

fluorine is a non metal, sodium is a metal and neon is a inert gas

Answer 2

The given 3 elements can be characterized as shown below:

(1.) The element 'A' has the atomic number '9' which is 'Florine' represented with the letter 'F'. It can be characterized as 'Halogen' and it is in the form of gas at room temperature. So element 'A' is Non-metal.

(2.) The element 'B' has the atomic number '11' which is 'Sodium' represented with the letter 'Na'. It can be characterized as 'Alkali metal present in 1st group of the periodic table and it is in the form of metal at room temperature. So element 'C' is metal.

(3.) The element '10' has the atomic number '10' which is 'Neon' represented with the letter 'Ne'. It can be characterized as 'Noble gas or Inert gas' and it is in the form of gas at room temperature. So element 'C' is Inert gas.

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