The radioactivity of the actinides generally makes them highly toxic to living cells, causing radiation poisoning. In terms of chemical behaviour,  and trends going down group 3 for properties such as melting point, electronegativity and ionic radius,   scandium, yttrium, lanthanum and actinium are similar to their group 1—2 counterparts.
PO4, which contains 0. Some tables, including the one published by IUPAC  refer to all lanthanides and actinides as being in group 3: Since the f-shell is nominally full in the ground state electron configuration for both of these metals, they behave most similarly to other period 6 and period 7 transition metals compared to the other lanthanides and actinides, and thus logically exhibit properties similar to those of scandium and yttrium.
He thereby finds that group 3 should consist of Sc, Y, Lu, Lr.
The element is known to damage cell membranes of water animals, causing several negative influences on reproduction and on the functions of the nervous system. However, different behavior is observed in other d-block groups, especially in group 4, in which zirconium, hafnium and rutherfordium share similar chemical properties lacking a clear trend.
The elements, after purification from other rare-earth metals, are isolated as oxides; the oxides are converted to fluorides during reactions with hydrofluoric acid.
However, it is essential for the methanotrophic bacterium Methylacidiphilum fumariolicum SolV, although the general similarity of the rare earths means that it may be substituted by some of the other early lanthanides with no ill effects.
Scandium has no biological role, but it is found in living organisms. In addition, the element of the cerium and thorium families are also included in the sub-group.
Soluble lutetium salts are mildly toxic, but insoluble ones are not. However, this resemblance in not unique to lutetium and lawrencium, but is common among all the late lanthanides and actinides.
This can cause lung embolisms, especially during long-term exposure. Scandium and yttrium are always classified as group 3 elements, but it is controversial which elements should follow them in group 3, lanthanum and actinium or lutetium and lawrencium. Normally, the rd electron would enter the d-subshell, but quantum mechanical research has found that the configuration is actually [Rn]7s25fp1 [note 7] due to relativistic effects.
The La and Ac variant remains the most common in the literature, despite some calls for a change to the Lu and Lr variant.
Sc 21 Y 39 La 57 Atomic wt. Lanthanides, as electropositive trivalent metals, all have a closely related chemistry, and all show many similarities to scandium and yttrium, but they also show additional properties characteristic of their partially filled f-orbitals which are not common to scandium and yttrium.
In this variant, the number of f electrons in the most common trivalent ions of the f-block elements consistently matches their position in the f-block.
Scandium is mostly dangerous in the working environment, due to the fact that damps and gases can be inhaled with air.
Apparently, group 3 comprising 32 elements as older periodic tables show is not considered. In other tables, lutetium and lawrencium are classified as the remaining members of group 3.
No group 3 element has any documented biological role in living organisms. The same is true for actinium. Other d-block groups are composed of four transition metals[note 6] and group 3 is sometimes considered to follow suit. It has however been argued that this is irrelevant because the principle of increasing basicity down the table is more fundamental, and because the behavior of the group 3 elements is more similar to their s-block neighbors than their d-block neighbors.
Lanthanum and actinium are sometimes considered the remaining members of group 3.Just like people in a family all may share similar traits, elements in the same group on the periodic table also will have similar properties. The groups are numbered from 1. Start studying Properties of elements in group 1 and group Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Group Name & Properties Assignment Details Friday, August 2, Hydrogen. Chemical Element. Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of u, hydrogen is the lightest element and its monatomic form is the most abundant chemical.
Transcript of Group Names & Properties. Promethium, originally identified as prometheum, was named for the Greek mythological figure Prometheus. Discovery The existence of promethium was predicted by Bohuslav Brauner, a Czech chemist, in Several groups claimed to have produced the element, but they could not confirm their.
Cape Town based property group. Focuses on developments and marketing in and around the Western Cape. Video: Group 3A Elements: Definition & Properties. +1 or +3. Group 3A elements have many uses, from laundry detergent to the foil lining your baking sheet to rat poison.
So, the next time you.Download