What were criteria used by Mendeléev in creating his Periodic Table ?

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Periodic Classification of Elements

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What were the criteria used by Mendeléev in creating his Periodic Table ?

Option A

Option B

Option C

Option D

Solution

Mendeleev’s periodic table was based on the observation that the properties of elements are a periodic function of their atomic masses. This means that if elements are arranged in the increasing order of their atomic masses, then their properties get repeated after regular intervals.

Standard 10

Science

Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common ?

easy

Which element has

$(a)$ two shells, both of which are completely filled with electrons?

$(b)$ the electronic configuration $2,\,8,\,2 ?$

medium

Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements ?

easy

What property do all elements in the same column of the Periodic Table as fluorine have in common?

easy

Which element has

$(a)$ a total of three shells, with four electrons in its valence shell?

$(b)$ a total of two shells, with three electrons in its valence shell?

$(c)$ twice as many electrons in its second shell as in its first shell?

medium

What were the criteria used by Mendeléev in creating his Periodic Table ?

Solution

Similar Questions

Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common ?

Which element has $(a)$ two shells, both of which are completely filled with electrons? $(b)$ the electronic configuration $2,\,8,\,2 ?$

Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements ?

What property do all elements in the same column of the Periodic Table as fluorine have in common?

Which element has $(a)$ a total of three shells, with four electrons in its valence shell? $(b)$ a total of two shells, with three electrons in its valence shell? $(c)$ twice as many electrons in its second shell as in its first shell?

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Which element has

$(a)$ two shells, both of which are completely filled with electrons?

$(b)$ the electronic configuration $2,\,8,\,2 ?$

Which element has

$(a)$ a total of three shells, with four electrons in its valence shell?

$(b)$ a total of two shells, with three electrons in its valence shell?

$(c)$ twice as many electrons in its second shell as in its first shell?