Group 3 is the largest group in modern periodic table as it contains 32 elements. Sc,Y,La,Ac and 14 Lanthanides and Actinides.
What is the biggest group in the periodic table?
Modern periodic table is divided into 7 periods and 18 groups. Group 1(H, Li, Na, K, Rb, Cs, Fr) is the longest group in the periodic table. The first group is called the alkali metals group.
Which group has most elements?
Group 1: Hydrogen and Alkali Metals
It is the most common element in the universe. All the other elements in group 1 are alkali metals. They are the most reactive of all metals, and along with the elements in group 17, the most reactive elements.
What is the smallest group on the periodic table?
Thus, helium is the smallest element, and francium is the largest.
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Periodic Trends — Atomic and Ionic Radii.
| 3A | (13) |
|---|---|
| 4A | (14) |
| 5A | (15) |
| 6A | (16) |
What is the name of group number 1?
Alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).
Are lanthanides and actinides radioactive?
Both actinides and lanthanides are highly reactive with elements from the halogen group. All of the lanthanides have at least one stable isotope except for promethium. None of the actinides have a stable isotope. They are all radioactive.
What are the 3 categories of elements?
Elements in different groups are lumped together in one of three classes, depending on their properties. The classes are metals, nonmetals, and metalloids. Knowing the class of an element lets you predict many of its properties.
What are the 3 major elements?
Many elements make up the human body, but only three occur in abundance. These elements, oxygen, carbon, and hydrogen, combine to form the constituents of some of the most essential processes in the human body, such as cellular respiration.
Which group is the most unreactive?
Which group of elements is the most unreactive? Why? The Noble Gases are the most unreactive b/c its outermost shell completes the energy level and is stable enough. Why do groups among the main-group elements display similar chemical behavior?
Which has largest radius?
Since the atomic radius decreases in a period but increases down the group so Sr of group II and period V is largest in size.
Which family of elements has only 1 valence electron?
A: Any element in group 1 has just one valence electron. Examples include hydrogen (H), lithium (Li), and sodium (Na). Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons).
Which is not a family of the periodic table?
When we told you about families, we said that they were groups of elements that react in similar ways. Hydrogen is a very special element of the periodic table and doesn’t belong to any family. While hydrogen sits in Group I, it is NOT an alkali metal.
What is Group 2 called?
Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A. … In most cases, the alkaline earth metals are ionized to form a 2+ charge.
What is Group 3 called?
Lr. Group 3A (or IIIA) of the periodic table includes the metalloid boron (B), as well as the metals aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). Boron forms mostly covalent bonds, while the other elements in Group 3A form mostly ionic bonds.
What group number is arsenic in?
Arsenic, atomic number 33 lies in between phosphorus and antimony in group 15, the so called Nitrogen group of the periodic table.