Examlex
Why is North Korea a challenge to foreign policy officials in the United States? Explain.
Mass
A property reflecting the amount of matter within an object, commonly measured in kilograms or grams.
Atomic Number
A fundamental characteristic of an element, indicating the number of protons in the nucleus of its atoms.
Avogadro's Number
A constant that represents the number of constituent particles, usually atoms or molecules, that are contained in one mole of a substance, approximately \(6.022 \times 10^{23}\).
Carbon-12
A stable isotope of carbon with 6 protons and 6 neutrons, serving as the standard for atomic mass among elements.
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