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Which two element is known as twin element?

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The three Group 4 elements that occur naturally are titanium (Ti), zirconium (Zr) andhafnium (Hf). The first three members of the group share similar properties; all three are hard refractory metals under standard conditions. read more

2) all atoms of a given element are identical to one another and different from atoms of other elements 3) atoms of 2 or more elements combine to form compounds. a particular compound is always made up of same kinds of atoms and same number of each kind of atom. read more

Titanium is considerably different from the other two owing to the effects of the lanthanide contraction. Physical Edit. The table below is a summary of the key physical properties of the group 4 elements. The four question-marked values are extrapolated. read more

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