SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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descending order of proton numbers
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descending order of atomic sizes
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ascending order of proton numbers
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ascending order of nucleon numbers
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Detailed explanation-1: -In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
Detailed explanation-2: -In Mendeleev’s periodic table, elements are arranged in an increasing order of their atomic number.
Detailed explanation-3: -Mendeleev arranged the elements in order of increasing weight and broke them into rows such that elements in each column shared valence, the number of other atoms they combined with, as well as other properties.
Detailed explanation-4: -The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups.
Detailed explanation-5: -Atoms are arranged in the periodic table of the elements according to their properties. For example, metals are grouped together, and nonmetals (except for hydrogen) are grouped together.