Question

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Answer 1

Answer:

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Answer 2

Answer:

7.

• Chemical formulas are used to describe the types of atoms and their numbers in an element or compound.
• In a chemical formula, the symbols for each element in the compound are followed by subscripts that tell us how many of that element are in the compound. The subscripts that follow each element's symbol indicate how many of that element are in the compound.
• hh
• Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. ... The molecular formula expresses information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols and numbers

8. A compound

9. Oxides

10. Chemical Change

11.

• homogeneous mixture
• Thomson
• Charges
• metalloids

111.

• Potassium -- K
• PHOSPHORUS -- P
• MERCURY -- Hg
• SULPHUR -- S

Step-by-step explanation:

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