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.
What is the biggest group on the table?
Group 3 is the largest group in modern periodic table as it contains 32 elements. Sc,Y,La,Ac and 14 Lanthanides and Actinides.
Which group on the periodic table has the largest number of elements?
Group 3 ( 32 ) has maximum number of elements because it includes lanthanaids and actinaids.
What is the smallest group on the periodic table?
Thus, helium is the smallest element, and francium is the largest.
…
Periodic Trends — Atomic and Ionic Radii.
| 3A | (13) |
|---|---|
| 4A | (14) |
| 5A | (15) |
| 6A | (16) |
Which is the largest period in periodic table?
The sixth period of the periodic table is the longest period of the periodic table.
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).
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 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.
What is the name of Group 3 in periodic table?
Group 3A. 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.
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).
What are the 8 families of elements?
FAMILIES OF ELEMENTS: Related elements, including the noble gases, halogens, alkali metals, alkaline earth metals, transition metals, lanthanides, and actinides. In addition, metals, nonmetals, and metalloids form loosely defined families.
What is the difference between a family of elements in the same period?
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Why is the 7th period incomplete?
7th period is considered incomplete because it consists of elements which have not been studied properly yet. … Thus, we can’t give them a permanent recognition as all the elements in the periodic table have many properties and similarities to follow.
Why does atomic size increase in a group?
In general, atomic radius decreases across a period and increases down a group. … Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.
Which is the longest period and longest group in long form of periodic table?
Answer: Group 3 is the longest group and sixth period is the longest period in periodic table with 32 elements.