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Why are groups important in the periodic table?

Why are groups important in the periodic table?

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

Why do we need to study the periodic table How does the knowledge of periodic table help the scientist in making our life easier?

Now, the table is useful for modern students and scientists because it helps predict the types of chemical reactions that a particular element is likely to participate in. Another useful feature of the periodic table is that most tables provide all the information you need to balance chemical reactions at a glance.

What is the significance of the group number?

1 Answer. The group number in the periodic table represents number of valence electrons of the elements in a certain group. For example, all the elements in Group−1 have 1 electron in their outer most shell.

What are the important groups of the periodic table?


  • Group 1: alkali metals, or lithium family.
  • Group 2: alkaline earth metals, or beryllium family.
  • Group 3: the scandium family.
  • Group 4: the titanium family.
  • Group 5: the vanadium family.
  • Group 6: the chromium family.
  • Group 7: the manganese family.
  • Group 8: the iron family.

Is B2O3 acidic or basic?

On moving down the group, the basicity of the oxide increases along with increase in metallic character of the element. Thus B2O3 is acidic, Al2O3 and Ga2O3 amphoteric while In2O3 and Tl2O3 are basic.

Is cr2o3 acidic or basic?

Is chromic oxide acidic or basic? Chromic oxide (or chromium(III) oxide) is an amphoteric compound. It has the ability to dissolve in acids, liberating hydrated chromium ions in the process. These hydrated Cr ions can react with bases to form complex salts.

Is zno acidic or basic?

For example, zinc oxide acts as an acidic oxide when it reacts with concentrated sodium hydroxide. However, it acts as a basic oxide while reacting with hydrochloric acid.

Which is less acidic B2O3?

Hence, it is said to be acidic. But, in the case of aluminium, since it is a metalloid( neither exactly a metal nor a non metal) and has decreased non metallic properties compared to boron, the oxide of aluminium is amphoteric( neither acidic nor basic) in nature.

Is Al2O3 acidic in nature?

Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. Aluminium oxide contains oxide ions so react with dilute hydrochloric acid.

Is mno2 acidic or basic?

Electrons are short of higher oxidation states, ensuring they can accept lone pairs and act as Lewis acids. MnO2 has the lowest state of oxidation, so it is the most basic and, essentially, Mn2O7 (which is actually acidic). So, MnO2 is generally weakly acidic and moderately basic and can be defined as amphoteric.

What is the pH of ZnO?

pH 10.5