explain trends in modern periodic table
Answers
Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.
Periodic trends arise from the changes in the atomic structure of the chemical elements within their respective periods (horizontal rows) and groups in the periodic table. These trends enable the chemical elements to be organized in the periodic table based on their atomic structures and properties.
Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.
Periodic trends arise from the changes in the atomic structure of the chemical elements within their respective periods (horizontal rows) and groups in the periodic table. These trends enable the chemical elements to be organized in the periodic table based on their atomic structures and properties.
Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.
Periodic trends arise from the changes in the atomic structure of the chemical elements within their respective periods (horizontal rows) and groups in the periodic table. These trends enable the chemical elements to be organized in the periodic table based on their atomic structures and properties.
Electronegativity
Electronegativity is the ability of an atom of any element to attract a shared pair of electrons in a chemical bond, towards itself. It is a measure of atom’s tendency to form a molecule by attracting electrons to itself. The most electronegative element is Florine and the least is Caesium.
So by this, you can probably deduce that as you move in a row (period) from left to right the electronegativity increases. And from top to bottom in a column (group) it will decrease. This is because when the number of shells increases as we go down a group, so the pull of the nucleus to attract electrons decreases.
Metallic and Non-metallic Properties
In the periodic table a zigzag line, across the table, separates the metals from the non-metals. As you will be able to notice on the periodic table, the metals such as Magnesium, Aluminium, Iron etc are clustered towards the left side of the table. And the non-metals such as Florine and Sulphur are found on the right.
Then there are the metalloids also known as the semi-conductors. These borders the zigzag line on the periodic table. These have some properties of metals and some of the non-metals. Some examples are Boron, Arsenic, Tellurium etc.
Answer:
- When the physical and chemical properties of elements in a period or a group of the modern periodic table are compared, certain regularity is observed in their variations. This is called as periodic trends in the modern periodic table.
- Valency, atomic size and metallic-nonmetallic character are some properties of elements which show periodic trends.
Hope you understood mate!!!