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Multiple Choice Question withTwo or More Choices Correct
The atomic number of iron is 26. Naturally occurring iron is found to contain isotopes of atomic mass numbers 54, 56, 57 and 58. Which of the following statements are correct?
(a) Every atom of iron contains 26 protons
(b) Some atoms of iron contain 30 neutrons
(c) Some atoms of iron contain 56 neutrons
(d) The four kinds of naturally occurring iron atoms have the same chemical properties

Chemistry

Multiple Choice Question
Which of the following does not characterise X-rays?

(a)	The radiation can iodise gases	(b)	It causwes ZnS to fluoresce
(c)	Deflected by magnetic and electric fields	(d)	Have wavelengths shorter than ultraviolet rays