SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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randomly
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alphabetical order
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based on whether an element symbol is one or two letters
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based on similar chemical and physical properties
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Detailed explanation-1: -In a periodic table arranged in order of increasing atomic number, elements having similar chemical properties naturally line up in the same column (group).
Detailed explanation-2: -The chemical elements are arranged from left to right and top to bottom in order of increasing atomic number, or the number of protons in an atom’s nucleus, which generally coincides with increasing atomic mass.
Detailed explanation-3: -A modern periodic table arranges the elements in increasing order of their atomic numbers and groups atoms with similar properties in the same vertical column (Figure 3.2. 2). Each box represents an element and contains its atomic number, symbol, average atomic mass, and (sometimes) name.
Detailed explanation-4: -Elements in the same column of the Periodic Table have similar chemical properties.
Detailed explanation-5: -The physical and chemical properties of elements depend on the number of valence electrons. Elements present in the same group have the same number of valence electrons. Therefore, elements present in the same group have similar physical and chemical properties.