An atom of argon has three electron shells, all of
which are full. its atomic mass is 40. how...
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Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1
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Why does bubbling occur when vinegar mixed with baking soda
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Which of the follow describes a disadvantage secondary sources have compared to primary sources?
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