Question

40 Ar18
A914,
Fe26.
207 Pb82,
Q 3: How many elements are present in each of the following
i) HF and Hf ii) Co and Co iii) Si and SiO2 iv) PoCl2 and POCC.
Q4. Write down the main Postulates of Dalton's Atomic theory​

Answer 1

Answer:

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Answer 2

Answer: HF and Hf

HF contains 2 elements Hydrogen and Fluorine

Hf ( Hafnium) is a chemical element only

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Explanation: