Concept explainers
Define the terms atom and element.
Interpretation:
The terms atom and element need to be defined.
Concept introduction:
Atom is the smallest quantity of a matter that retains the properties of matter. Atom consists of electrons, protons and neutrons. The size of atom is very small and it is not possible to see with naked eye.
Element constitutes all the ordinary matter of universe. Element is said to be comprised of atoms of only one type. Element cannot be broken down into simpler units by any means.
Answer to Problem 2.1QP
Atom is the smallest quantity of a matter that retains the properties of matter.
Elements are comprised of atoms. Element cannot be broken down into simpler substances by any means. Some of the examples of elements are gold, oxygen ...etc
Explanation of Solution
Explanation
The concept of atoms was first proposed by philosopher Democritus in fifth century B.C. Dalton said atoms are tiny indivisible particles of matters. Atoms are made up of sub-atomic particles namely, electrons, protons and neutrons. Properties of atoms are determined by the nature of subatomic particles present in it and its arrangement. This in turn determines the properties of all materials.
Elements are comprised of atoms. Element cannot be broken down into simpler substances by any means. Some of the examples of elements are gold, oxygen etc,. If we break an element in its atomic level the atoms formed from the element will not be the same element. The atoms in an element have the same atomic number. Till date 118 known substances are found.
Conclusion
The atoms and elements are defined as above.
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Chapter 2 Solutions
Chemistry: Atoms First
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