What are the five periodic trends?
Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radius, ionic radius, metallic character, and chemical reactivity.
What is the trend across the period?
Across a period, effective nuclear charge increases as electron shielding remains constant. This pulls the electron cloud closer to the nucleus, strengthening the nuclear attraction to the outer-most electron, and is more difficult to remove (requires more energy).
What are the 7 periodic trends?
Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character.
How do you remember the trends on the periodic table?
The periodic trends tell you in which direction of the periodic table do you have increasing values for different chemical properties. The mnemonic is bear: B E A R. And each letter stands for different chemical properties.
What does each thing mean on the periodic table?
Element Boxes The atomic number, the number at the top of each element box, is the number of protons in the nucleus and the number of electrons in the atom. The elemental symbol is an abbreviation of the element name. Some periodic tables do not include the element names, only the symbols.
Why does the size of an atom increases from top to bottom?
(i) Atomic size increases as we move from top to bottom because each time one new shell is added and electrons in the outermost shell move away from the nucleus.
How would you define and explain periodic trends?
Periodic trends. The periodic trends are based on the Periodic Law, which states that if the chemical elements are listed in order of increasing atomic number, many of their properties go through cyclical changes, with elements of similar properties recurring at intervals. For example, after arranging elements in their increasing atomic numbers, many of the physical and chemical properties of
How do we define periodic trends?
Variation of Physical Properties Within a Group. The physical properties (notably,melting and boiling points) of the elements in a given group vary as you move down the table.
What are examples of periodic trends?
Periodic trend of atomic radius across a period – As we move from left to right in a period, atomic radius gradually decreases. Reason – As we move left to right in a period atomic number of the elements increases so nuclear charge increases while number of shells in elements remain the same. Example –. Elements of 2nd period. Li.
What does a periodic trend look like?
Through the periodic table, there are trends that show non-metallic character increasing from left to right throughout a period and from down to up across a group, and metallic character increasing in the opposite way. The electron configurations of atoms are the fundamental cause of various patterns of behavior.