SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Molecules
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atom
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Iron
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matter
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Detailed explanation-1: -An atom is the basic unit of a chemical element. Atoms are made out of three main parts: protons, neutrons and electrons. Protons and neutrons are contained inside the very center of the atom, which is called the nucleus. Electrons orbit around the outside of the nucleus.
Detailed explanation-2: -The basic unit of an element is atom, whereas the basic unit of a compound is molecule.
Detailed explanation-3: -Atoms contain protons, electrons, and neutrons, among other subatomic particles. The only exception is hydrogen (H), which is made of one proton and one electron with no neutrons.
Detailed explanation-4: -Atoms are the smallest unit of matter that can exist independently.
Detailed explanation-5: -The atomic mass unit (AMU or amu) of an element is a measure of its atomic mass. Also known as the dalton (Da) or unified atomic mass unit (u), the AMU expresses both atomic masses and molecular masses.