WHAT ARE THE DIFFERENCES BETWEEN ACTANOIDS AND LANTHANOIDS ??
Answers
Answer:
Lanthanides are involved in the filling of 4f- orbitals whereas actinides are involved in the filling of 5f-orbitals.
The binding energy of 4f electrons is comparatively less than that of 5f-electrons.
Lanthanides are non-radioactive in nature except promethium whereas all actinide series elements are radioactive.
Explanation:
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Answer:
Lanthanides
Actinides
Oxidation states
most common oxidation sates=+3
other oxidation state=+2, +4
Oxidation states
Most common oxidation states=+3
other oxidation states= +4,+5,+6
Atomic and ionic size
Size of the atom/ion decreases across the period.
In the group, size of a lanthanide element is smaller than the actinide of its own group. Atomic and ionic size Size of atom/ion decreases along the period.
Actinide has largest size in its own group
Chemical activity
Less tendency towards the complex formation. Except promethium, they are non radioactive.
They do not form oxidations
oxides and hydroxides are less basic. Chemical activity
Stronger tendency towards the complex formation. All the actinides are radioactive.
They form oxocations like
oxides and hydroxides are more basic.
Electronic configuration
Lanthanum(La) - 5d16s2 Electronic configuration Actinium (Ac)- 6d17s2
Explanation:
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