4/19/2023 0 Comments Periodic table groups![]() The elements were arranged into groups and periods based on certain characteristics such as chemical/physical properties for groups and electron configurations for the periods. Periods are the horizontal rows while the groups, also called families, are the vertical columns. If you would like to know more about Group VII elements, check out this post.Ĭlick here if you would like to know more about noble gases and transition elements.Periods and groups are the two important classifications that ancient chemists used to organize the iconic periodic table into columns and rows. If you would like to know more about Group I elements, check out this post. Topic: The Periodic Table, O Level Chemistry, Singapore They form ions of -2 and -1 respectively.Įlements in Group IV and V tend to share electrons to form covalent compounds.Įlements in 0 have stable noble gas electronic configuration. They gain electrons to form negative ions. They form ions of +1, +2 and +3 respectively.Įlements in Group VI and VII are non-metals. They lose electrons to form positive ions. The common examples are carbon monoxide (CO), nitrogen monoxide (NO) and water (H 2O) Relationship between Group number and ion formedĮlements in Group I, II & III are metals. The common examples are ZAP- zinc oxide (ZnO), aluminium oxide(Al 2O 3) and lead(II) oxide (PbO). ![]() Some oxides of metals are both basic and acidic, we call them amphoteric oxides. The oxides of metals are usually basic, and the oxides of non-metals are usually acidic. The chemical properties of the oxides change from basic oxide to amphoteric oxide to acidic oxide across the Period. Properties of elements across a PeriodĮlements in the same Period have the same number of electron shells.įor example, elements in the third period has three electron shells.įrom left to right, across a period, there is a decrease in metallic properties and an increase in non-metallic properties. Going down the Group, the proton number increases and atomic size increases. They form ions of the same charge, same number of bonds and form compounds of similar formula. Names of elements in different Groupsīetween Group II & III: Transition Metals/Transition Elements Properties of Elements in a GroupĮlements in the same Group have the same number of valence electrons and similar chemical properties. Elements with large number of electrons in the outermost shell are non-metals (Group VII and 0).įrom left to right, across a period, there is a decrease in metallic properties and an increase in non-metallic properties. In general, elements with small number of electrons in the outermost shell are metals (Group I and II). One common example is Silicon, which is widely used in semi-conductor industry. Metalloids are special, because they have the properties of both metals and non-metals. The elements include- boron, silicon, germanium, arsenic, antimony, tellurium and polonium. In the Periodic Table shown in this video, the metalloids are coloured orange. The elements that are near this line are called metalloids. Metals are on the left, while non-metals are on the right of the diagonal line. ![]() We can draw a diagonal line in the Periodic Table to divide the metals from non-metals. The elements in a Periodic Table can be classified based on their metallic and non-metallic properties. Metallic to non-metallic character of elements across a period ![]() The block of metals in the middle of Periodic Table, between Group II and III, are called transition elements, or transition metals. Group 0 is sometimes known as Group VIII.Ī Period is a horizontal row of elements. There are eight groups of elements, numbered in roman numeral, I, II, III, IV, V, VI, VII, 0. Elements are divided into Periods and Groups.Ī group is a vertical column of elements. The Periodic Table is a list of elements, arranged in order of increasing proton or atomic number. In this video, we will explore more on the Periodic Table, and find out what are the general features and patterns in the Periodic Table. Chemistry Online Learning Video – The Periodic Table ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |