In Modern Periodic Table, calcium (atomic number 20 ) is surrounded by elements with atomic numbers

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Periodic Classification of Elements

easy

In the Modern Periodic Table, calcium (atomic number $20$) is surrounded by elements with atomic numbers $12$, $19$, $21$ and $38$. Which of these have physical and chemical properties resembling calcium?

Option A

Option B

Option C

Option D

Solution

The element with atomic number $12$ has same chemical properties as that of calcium. This is because both of them have same number of valence electrons $(2)$.

Standard 10

Science

What were the limitations of Newlands’ Law of Octaves ?

medium

Which element has

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

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

medium

How could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table ?

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Name

$(a)$ three elements that have a single electron in their outermost shells.

$(b)$ two elements that have two electrons in their outermost shells.

$(c)$ three elements with filled outermost shells.

medium

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

medium

In the Modern Periodic Table, calcium (atomic number $20$) is surrounded by elements with atomic numbers $12$, $19$, $21$ and $38$. Which of these have physical and chemical properties resembling calcium?

Solution

Similar Questions

What were the limitations of Newlands’ Law of Octaves ?

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

How could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table ?

Name $(a)$ three elements that have a single electron in their outermost shells. $(b)$ two elements that have two electrons in their outermost shells. $(c)$ three elements with filled outermost shells.

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

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Which element has

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

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

Name

$(a)$ three elements that have a single electron in their outermost shells.

$(b)$ two elements that have two electrons in their outermost shells.

$(c)$ three elements with filled outermost shells.