Find the position of element with atomic number 35 in the periodic table

Predict the position of an element with atomic number 55 in the periodic table and explain the chemical behaviour of tha element.

Can an element X having an atomic number 25.5 be placed in the periodic table between Cr (24) and Mn (25) ?

In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: What is the number of valence electrons in an element of group 1 and group 18 respectively?

In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: What is the trend in the variation of valency while going down a group?

Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respectively. State their position (Group number and period number both) in the Modern Periodic Table.

Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respectively. (a) State their positions (Group number and period number both) in the Modern Periodic Table. (b) Arrange these elements in the decreasing order of their atomic radii. (c) Write the formula of the compound formed when 'X' combines with 'Z'.

Compare and contrast the arrangement of elements in Mendeleev's periodic table and the modern periodic table.