Metallicity- Metallicity can becompared to the tendency of an atom to lose electron. Electronegativity– While going towards the bottom of group, electronegativity keeps decreasing. Similar to the trend of ionisation energy, electron affinity decreases while moving towards bottom in a group. Atom will release energy if an electron is plucked from it or stuffed into it. Electron affinity– Its meaning is right opposite to that of ionisation energy. So we can conclude that the value of ionisation energy decreases as we go down along the group. As the atomic radius increases as we move down the group, the influence of nucleus decreases on the electron and hence it becomes easier to remove electron. Ionisation energy – The minimum value of energy required to pull out an electron from the influence of nucleus is called as ionisation energy. We can say that due to addition of an extra shell, the atomic radius increases as we go down along the group. 
Atomic radius- As we move down the group, an extra shell is added in the elements. We shall discuss about these trends in section given below. The properties exhibited by these elements follow different trends along the group. Group trendsĪ column of periodic table is called as group. We can conclude that the metallicity value decreases when we move towards right in a period. Metallicity- The metals are situated at the left hand side of the periodic table and non metals are situated at the right hand side of the periodic table. Electronegativity – This property increases its value when we move towards right in the period. Electron affinity will increase while moving towards right in the periodic table. 
Energy is released when an electron is stuffed into an atom meaning it is added to an atom.
Electorn affinity– This property is exactly opposite to ionisation energy. As the radius decreases acrosss a period, the ionisation energy keeps on increasing as we move across a period. Ionsiation energy- Ionisation energy depends on the atomic radius. This is due to the fact that the magnitude of nuclear charge is same but number of electrons keep increasing in the shell. Atomic radius– The atomic radius or the size of an atom generally decreases as we move across a period from left to right. We shall discuss about different trends in a period in the section given below. There are certain exceptions as well which don’t fit inside the trend. Periodic trendsĭifferent properties follow different trends as we move from left to right in a period. We shall discuss about them in later sections of this article. 
Even the groups follow a trend for different properties. These groups divide metals from non metals and noble gases and alkali metals. Here as we move down the group, the atomic number increases but not by 1. Similarly, the columns are called as groups. What is a group?Īs discussed above, rows of periodic table are called as period. Noble gases are considered as the most stable elements in the periodic table.
#DOES ATOMIC RADIUS INCREASE DOWN A GROUP FREE#
Noble gases have no free electron revolving around the nucleus. The last element of any period is a noble gas. The atomic number increases by 1 as we move ahead in a period. Horizontal arrangement of chemical elements in periodic table is termed as period. What is a period?Ī period is simply a row in periodic table. Number of protons for every chemical element is unique hence it is considered as the fingerprint of that particular chemical element. The arrangement of chemical elements in the periodic table is done in increasing values of atomic numbers. It is simply the total number of protons present inside the atom. What is atomic number?Ītomic number is considered as the fingerprint of the chemical element. We shall study about the trends of ionisation energy across both periods and groups. With all the rows being called as period and all the columns being called as groups. These elements are given a specific atomic number and are then arranged in ascending order of atomic number. Periodic table is a table which represents different chemical elements found on Earth. Image credits: Double sharp, First Ionization Energy blocks, CC BY-SA 4.0 What is periodic table? Image: Ionization Energies of different elements
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