Which of the following best describes an element?
A) a small, dense, positively charged subatomic particle
B) a fundamental form of matter that can be broken into simpler substances by ordinary chemical processes
C) a fundamental form of matter that cannot be broken into simpler substances by ordinary chemical processes
D) a naturally occurring inorganic solid with a characteristic chemical composition and a crystalline structure

Question

Quizplus · Accepted Answer

An element is a fundamental form of matter that cannot be broken into simpler substances by ordinary chemical processes. It consists of atoms with the same number of protons in their nuclei, which determines its chemical properties and atomic number. Examples of elements include hydrogen, oxygen, carbon, and iron.

Option A is incorrect because it describes a proton, a subatomic particle that contributes to the positive charge of an atomic nucleus.

Option B is incorrect because it describes a mixture or compound, not an element. Mixtures are combinations of different substances that can be separated by physical means, whereas compounds are combinations of two or more elements in specific proportions that can be broken down by chemical reactions.

Option D is incorrect because it describes a mineral, which is a naturally occurring inorganic solid with a characteristic chemical composition and a crystalline structure. Minerals may or may not contain elements as part of their chemical composition.

Which of the Following Best Describes an Element