Common-Core/ Grade 7
Science MCQ Based On How are substances represented by models and chemical formulas
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Common-Core Grade 7 - 7 How are substances represented by models and chemical formulas
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23 and 35.5
Check the number of atoms of each element .
Electricity
2X27+[32+(16X4)]X3+18X18
Chemical formula
Calcium carbonate with 3 oxygen.
A dense nucleus of protons and neutrons.
Use small number to the bottom right.
P for every mole of O.
Elements that makeup.
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