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Atomic structure, elements, compounds, and chemical reactions
What is the smallest particle of an element that retains its properties?
Which subatomic particle has a negative charge?
Water (H?O) is an example of a _____.
What type of change occurs when ice melts?
The periodic table is organized by increasing _____.
Which of the following is a chemical change?
In a neutral atom, the number of protons is equal to the number of _____.
The rapid reaction of a substance with oxygen, producing heat and light, is called _____.