SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The smallest part of any substance which can exist on its own
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Two or more atoms chemically joined together (can be the same or can be different)
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A simple substance in which all the atoms are identical
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Two or more different elements chemically joined together
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Detailed explanation-1: -(EH-leh-ment) A basic part of a whole. In chemistry, refers to a simple substance that cannot be broken down into smaller parts or changed into another substance. The basic part of an element is an atom, which contains protons, neutrons, and electrons. All atoms of an element have the same number of protons.
Detailed explanation-2: -Element is a pure substance made up of only one kind of atom which can’t be split up into two or more substance. compound is a pure substance made up of two or more substance combined in fixed proportion by mass.
Detailed explanation-3: -Example: Water decomposes into a mixture of hydrogen and oxygen when an electric current is passed through the liquid. Hydrogen and oxygen, on the other hand, cannot be decomposed into simpler substances. They are therefore the elementary, or simplest, chemical substances-elements.