Which of the following statements about electric charge is true?

• A. Electric charge is measured in $C$.
• B. Electric charge can only exist in the form of electrons.
• C. Electric charge is created or destroyed in chemical reactions.
• D. Electric charge is a fundamental property of matter that can be positive $+$ or negative $-$.

Answer: (D)

Verified step by step guidance

1. Understand that electric charge is a fundamental property of matter, meaning it is an intrinsic characteristic of particles such as protons and electrons.
2. Recall that electric charge comes in two types: positive (+) and negative (-), which are carried by protons and electrons respectively.
3. Recognize that electric charge is measured in coulombs (C), which is the SI unit for charge.
4. Know that electric charge cannot be created or destroyed; it is conserved in all physical and chemical processes.
5. Conclude that the correct statement is that electric charge is a fundamental property of matter that can be positive or negative.