Periodic table diagonal relationships

The properties of the head element of a main group in the periodic table resemble those of the second element in the next group. Discuss this diagonal relationship with particular reference to (a) lithium and magnesium, (b) beryllium and aluminium. 

Relationships in the periodic table horizontal, vertical, and diagonal with examples from alkali metals, alkaline earth metals, halogens, and the first series of transition elements... 

Trends for the elements may be either horizontal or vertical. The combination of these leads to diagonal relationships that increase either from the lower left to the upper right on the periodic table or from the upper right to the lower left. There are few trends that increase along another diagonal or that are only horizontal or vertical. You should remember that the noble gases are not included in some trends. In addition, hydrogen is often an exception to many trends. 

Intermetallic chemistry of Be, Mg, Zn, Cd and Hg 5.12.4.1 Phase diagrams of the Be, Mg, Zn, Cd and Hg alloys. The systematics of the compound formation of these metals in their binary alloys with the different elements is summarized in Fig. 5.33. On the overall they give a rather complex picture even so a number of relationships and similarities between various pairs of metals may be singled out. To go into this point in more detail, in the same figure a comparison has also been made with the compound formation patterns of Ca and A1 which are described in 5.4 and 5.13 but are close in the Periodic Table to the metals here considered. The similarity between the Be and Zn patterns may be underlined, as also that between Be and Al, being an example of the so-called diagonal relationships presented in 4.2.2.2. 

Like carbon, phosphorus is covalently bound to its neighboring atoms in all of its compounds, except perhaps for some metallic phosphides. Indeed, the chemistry7 of carbon and that of phosphorus are somewhat similar as might be expected from the diagonal relationship of these elements in die periodic table. 

A diagonal relationship is a similarity in chemical properties between an element in the periodic table and one lying one period lower and one group to the right. 

Second, certain elements resemble the element at their lower right or their upper left in the Periodic Table more than their own congeners. This diagonal relationship is best considered for the following portion of the table ... 

The fact that Be2+ resembles Al3+ is known as a diagonal relationship because A1 is one column to the right and one row below Be along a diagonal in the periodic table. 

Diagonal relationships in the periodic table exist as well as the vertical relationships. For example, Be and Al are similar in some of their properties, as are B and Si. Rationalize why these diagonal relationships hold for properties such as size, ionization energy, and electron affinity. 

Give some illustrations of diagonal relationships in the periodic table, and explain each. 

Tll.l It would be a good idea to review Section 9.2(d) Diagonal relationship. Look at the reasons why diagonal relationships between elements occur within the Periodic Table. Then look for the relevant values of atomic properties for Li and Mg (Chapter 12 or resource sections) and compare and contrast them— you will find significant similarities. 

Diagonal relationship. Similarities between pairs of elements in different groups and periods of the periodic table. (8.6)... 

Figure 14.2 Three diagonal relationships in the periodic table. Certain Perbd 2 elements exhibit behaviors that are very similar to those of the Period 3 elements immediately below and to the right. Three such diagonal relationships exist Li and Mg, Be and Al, and B and Si.

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