Why are all of the substances on the periodic table classified as elements?
Question 5 options:
Substances on the periodic table cannot be broken down into other substances and are therefore elements.
Substances on the periodic table can be combined to form compounds and are therefore elements.
Substances on the periodic table cannot be dissolved in water or other liquids.
All elements are pure substances.
Answers
All of the substances on the periodic table classified as elements because all elements are pure substances.
Explanation: A chemical element or element is a species of atoms having the same number of protons in their atomic nuclei that is the identical atomic number, or Z.
An element is a species of atoms which all have the same protons in their nuclei.
An element reacts with another element to form a compound.
Elements cannot be broken further .
They either combine with themselves or other elements to form a compound.
An element could be a metal or a non metal.
Examples of elements are :
Sodium,Chlorine and Hydrogen.
From the information above the correct answer is thus :
Substances on the periodic table cannot be broken down into other substances and are therefore elements.