SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Matter may be solid, liquid or gas.
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Elements can be decomposed into simpler substances by ordinary chemical reactions.
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A compound is any substance composed of atoms of two or more different elements that are chemically combined
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A molecule is the combination of two or more atoms held together by covalent bonds.
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Detailed explanation-1: -Elements are pure substances that cannot be broken down into simpler substances by ordinary chemical means.
Detailed explanation-2: -Elements are the simplest forms of matter and therefore cannot be broken down into simpler substances by any chemical or physical means. Elements are the building blocks for all other substances. Some examples of elements include hydrogen, oxygen, carbon, and sulfur.
Detailed explanation-3: -Elements are those pure substances that cannot be decomposed by ordinary chemical means such as heating, electrolysis, or reaction. Gold, silver, and oxygen are examples of elements.
Detailed explanation-4: -chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.