SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mixtures
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Elements
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Atoms
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Molecules
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Detailed explanation-1: -A molecule is the pure basic substance that cannot be split into two or more simpler substances by chemical methods.
Detailed explanation-2: -The smallest particle of an element that cannot be divided or broken up by chemical means. It consists of a central core (or nucleus), containing protons and neutrons, with electrons revolving in orbits in the region surrounding the nucleus.
Detailed explanation-3: -Atom : The smallest particle of an element, made of electrons, protons and neutrons. Element : A pure substance composed of the same type of atom throughout.
Detailed explanation-4: -An element is the simplest substance and cannot be broken down using chemical methods. It is a substance consisting of atoms which all have the same number of protons (atomic number). For example, oxygen, hydrogen etc. There are 118 elements known till date.
Detailed explanation-5: -Each kind of atom is an element. Elements are pure substances that cannot be broken down into simpler substances by ordinary chemical means.