increase of protons and electrons
Excepting groups 5-12 of the periodic table.the atomic radius increase down in the group.
The modern periodic table is modified form of the mossleys periodic table,which was yet modifiied form of the mendileevs periodic table,which was based on the principle-atomic mass is the periodic function of the elements.Mossley changed the periodicity of elements to be the periodic functions of their atomic numbers.hence in the modern periodic table we can find,the repeatation of certain properties of elements after definite intervals and hence the periodic table has groups and periods the elements inside which,are similar.this is possible because across a period electrons increase by 1,keeping shells sama,and down a group,outer electrons remain same,but shells increase by1.
in groups metallic character increases with atomic number because each successive element gets closest to Fr
Periodic table is arranged by atomic number. elements are arranged in groups and periods.
The group number tells you the number of valence electrons in the outer shell. This is important because it is the valence electrons that participate in bonding, and thus in determining the properties of the element.
Excepting groups 5-12 of the periodic table.the atomic radius increase down in the group.
As the orientation goes down, the elements become more solid. :-)
Your question is incorrect. It should be increases rather than decreases. Well it is the proton number (Z) that increases.
Elements are arranged on the Periodic Table in the order of the atomic number, in groups and periods.
The vertical columns on the periodic table are groups. Groups show patterns in ionization energies, electronegativity and atomic radius.
Horizontal rows are called groups. Groups are formed according to the atomic number.
Horizontal rows are called groups. Groups are formed according to the atomic number.
periodic trends are the tendencies of certain elemental characteristics to increase or decrease as one progresses along a row or column of the periodic table of elements.
The modern periodic table is modified form of the mossleys periodic table,which was yet modifiied form of the mendileevs periodic table,which was based on the principle-atomic mass is the periodic function of the elements.Mossley changed the periodicity of elements to be the periodic functions of their atomic numbers.hence in the modern periodic table we can find,the repeatation of certain properties of elements after definite intervals and hence the periodic table has groups and periods the elements inside which,are similar.this is possible because across a period electrons increase by 1,keeping shells sama,and down a group,outer electrons remain same,but shells increase by1.
atomic number Chemical elements are organized in the form of the periodic table of Mendeleev, in groups and periods.
Before Henry Moseley, the periodic table was arranged in order of increasing atomic mass. However, this arrangement did not allow all the elements to be placed into groups of similar chemical properties. Moseley rearranged the periodic periodic in order of increasing atomic number which did have all the elements in their correct groups.
The elements are arranged in order of increasing atomic number in the Periodic Table. The rows are called periods and the columns are called groups.