Literacy
Write formulas for the
compounds formed by the
following pair of elements:
- hydrogen (1) and sulfur (2)
- iron (3) and chlorine (1)
- lead (4) and oxygen (2)
- barium (2) and iodine (1).

AyanCoolgirlBaku AyanCoolgirlBaku    3   26.04.2020 20:53    8

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