Atomic number weight periodic chart reading fill in the blanks 23
74. exercise
| soon | chemistry | history | possible | alchemists | pure |
To learn the speech of alchemy, an early form of chemistry in which people attempted to turn metals into gold, it helps to think back to a time when there was no science: no atomic number or weight, no periodic chart, no list of elements. To the …………………….. the universe was not made of leptons, bosons, gluons, and quarks. Instead it was made of substances, and one substance say, walnut oil-cloud be just as ………………. as another say, silver-even though modern ……………………… would say one is heterogeneous and the other homogeneous. Without knowledge of atomic structures – how would it be ……………………. to tell elements from compounds?
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Atomic number weight periodic chart reading fill in the blanks 23