Write the chemical formula of the compound formed when boron reacts with chlorine
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1) the element with atomic number(Z) 17 & mass number (A) 35 is chlorine =
2) the element with atomic number(Z) 92 & mass number (A)233 is uranium =
3) the element with atomic number(Z) 4 & mass number (A) 9 is berellium =
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