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Pencils have never contained the metal, lead, although the word commonly used to describe the centre core of a pencil is, in English, 'lead'. The ancient tool which preceded the modern pencil was a...
Isotopes of any element are those atoms which have the same no. of protons and electrons as the usual atom of that element but have extra neutrons. This makes their mass greater than the usual atoms...
No. The ancient tool which preceded the modern pencil was a stylus, and these were frequently made from lead. The modern pencil however is made with graphite in its core.