There are three specific periodic trends. In the modern periodic table, elements are arranged by their atomic number. Addition of another electron does not result in a fractional decrease in the electrostatic attraction to any given electron, but it does increase the electron-electron repulsion, so an overall decrease in Net attractive force. This means is that as you move down a group or across a period, you will see a trend-like variation in the properties. Hi Oishi, if a molecule is larger or more complex, there is more room for chaos. Thats why a larger molecule has more entropy than a smaller molecule. Reason As we move left to right in a period the atomic number of the elements increases so nuclear charge increases while the number of shells in elements remains the same. As you move down a group in the periodic table, atomic size generally. The internal energy levels “shield” and reduce electrostatic attraction of the valence electrons to the protons. Periodic Trends Last updated Periodic Properties of the Elements Periodic Trends in Ionic Radii Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties. The more complex or intricate something is (which sort of comes with size and number of subatomic particles), the greater the chance of randomness. The periodic trend of atomic radius across a period As we move from left to right in a period, atomic radius gradually decreases. Which of the following elements is expected to have the largest atomic radius. (2) Number of energy levels: The greater the number of energy levels, the larger the atomic radii. (1) Nuclear charge (number of protons) : The stronger the ‘pull’ the protons have to the electrons with electrostatic attraction, then the smaller the size of the atom radii The atomic size of an atom, also called the atomic radius, refers to the distance between an atoms nucleus and its valence electrons. Let’s discuss the definition of the atomic radius, also called atomic size, and the atomic radius trend on the periodic table. Atomic Radii is affected by two main factors :

Atomic size trend on periodic table