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Proper place for inert gases. Now elements are arranged according to atomic number instead of atomic mass. Isotopes problems is solved.
Metalloids
All the elements of group 2 have valency 2.
S, Fe and Se
It is based on periodicity of atomic number of elements.
How could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table?
Proper place for inert gases. Now elements are arranged according to atomic number instead of atomic mass. Isotopes problems is solved.
- Proper place for inert gases.
- Now elements are arranged according to atomic number instead of atomic mass.
- Isotopes problems is solved.
See lessName the elements that separated the metals and non-metals in periodic table.
Metalloids
Metalloids
See lessAn element ‘x’ belongs to groups 2. Find its valency.
All the elements of group 2 have valency 2.
All the elements of group 2 have valency 2.
See lessFill in the blanks: According to Newland’s law of octave ______________is similar to oxygen.
S, Fe and Se
S, Fe and Se
See lessFill in the blanks: The basis of modern Periodic table is _______________
It is based on periodicity of atomic number of elements.
It is based on periodicity of atomic number of elements.
See less