Question

Which of the following is an element . 1 ) Sodium chloride 2 ) Carbon-dioxide 3 ) Oxygen 4) All of these​

Answer 1

3) oxygen is an element

1) Sodium Chloride and Carbon Dioxide are compounds

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Answer 2

Answer:

(iv)all of this. Because in these option 1 , 2 , 3 is the elemet in Science .