VIDEO TO SHOW PERIODIC TABLE CLASSIFICATION

GROUP III ELEMENT

Group III element:

Group 3 elements have 3 valence electrons. Group 3 elements can react by losing 3 electrons. When the 3 electrons are lost, a full shell of 8 electrons is exposed, creating more stable conditions. Elements which fall into group 3, are said to be part of the boron group. Members of the boron group include:

• Boron
• Aluminium
• Gallium
• Indium
• Thallium

Apart from boron, the rest of the group 3 elements are poor metals. This means that they are softer, have a lower melting point and are less conductive than the transition metals. An example of the poor metal properties can be seen below with the gallium spoon experiment.

GROUP II ELEMENTS

Group II element:
alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium  (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
Structurally, they have in common an outer s- electron shell which is full. that is, this orbital contains its full complement of two electrons, which these elements readily lose to form cautions with charge +2, and an oxidation state of +2.

GROUP I ELEMENTS

Group 1 element:

Did you know that the elements in the periodic table are further classified on the basis of their properties? Well, depending on the nature of reaction that the metals display, some of the metals are called Alkali metals. Making such classification is sometimes vital to the understanding of different elements.

It also helps us in determining the expected outcome of a given element, based on its placement in the periodic table. Hence, studying alkali metals and their properties is very interesting and stimulating to the overall knowledge of the periodic table. Let us understand more about these metals.

Alkali Metals – Group 1 Elements

Included in the Group 1 of the periodic table are the following elements:

• Lithium
• Sodium
• Potassium
• Rubidium
• Cesium

The general electronic configuration of Group 1 elements is ns¹. They have a strong tendency to donate their valence electron in the last shell to form strong ionic bonds. They have the least nuclear charge in their respective periods. As we move down the group, the atomic radius increases. Therefore, the nuclear charge decreases. Cesium is the most metallic element in the group.

PERIODIC CLASSIFICATION

PERIODIC  CLASSIFICATION

Periodic Classification of Elements:

Present form of periodic table (Long form) Based on the modern periodic law, the elements are arranged into rows and columns based on their atomic number. There are 18 columns, called groups and 7 rows, called periods.

Periodic table:

is a tabular arrangement of the chemical elements, arranged by atomic number, electron configuration, and recurring chemical properties, whose structure shows periodic trends. The seven rows of the table, called periods, generally have metals on the left and non-metals on the right. The columns, called groups, contain elements with similar chemical behaviors. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals.