Skip to main content

NCERT Chemistry class 12- What is Group 16 Elements

NCERT Chemistry class 12- Group 16 Elements 

NCERT Chemistry class 12 - Group 16 elements are known as the oxygen family or chalcogens. They include elements oxygen (O), sulphur (S), selenium (Se), tellurium (Te), and the radioactive element polonium (Po).

ATOMIC AND PHYSICAL PROPERTIES
Atomic and Ionic Radii: The atomic and ionic radius of the group 16 elements increases as one move from oxygen to polonium (top to bottom).As the number of shells increases on going down the group, atomic and ionic radii increase from top to bottom in the group. However, the size of oxygen atoms is exceptionally small.
Ionization Enthalpy: Ionisation enthalpy of the elements decrease down the group, as there is an increase in the size of the atoms down the group. However, the element of group 16 has lower ionization enthalpy values as compared to those of group 15 in the corresponding periods. This is due to the fact that group 15 element have extra stable half-filled p orbitals electronic configurations.
Click below for more notes of CBSE class 12
Labels:

Comments

Post a Comment

Thank you we will contact ASAP.

Popular posts from this blog

Lessons-Worksheets-Question Papers-CBSE Class 2 English

Lessons-Worksheets-Question Papers-CBSE Class 2 English CBSE 2nd Class English – One and Many  In this blog, we share the spelling rules used in the concept of  One  and Many. When there is only one of a naming word (noun), it is said to be a  singular noun . When a noun shows more than one, it is said to be in the  plural . We can add  –S, -es, -ves or ies  to show that there is more than one noun.  For example,  we say many birds, four biscuits, six brushes. But for the students of  Class 2 , it’s very difficult and confusing to understand where to use  s , es, ves or ies  in the form of many. Don’t worry, it looks difficult, but it is very easy as in grammar each concept has a set of rules that need to practice. Noun ending with  –s, -x, -o, -sh, -ch, and –ss  form plurals by taking  –es. Look at these pairs of words: Bus – Buses Brush – Brushes Continue ..... Click here ...
Post a Comment
Read more

Magnetic and non-magnetic material Class 6 Science

Magnetic and non-magnetic material  Class 6 Science A magnet is a substance that is drawn to certain magnetic materials like iron, cobalt, and nickel. Magnets have the ability to draw iron to them. Natural magnets are rocks that naturally draw iron. Non-magnetic materials include things like wood, rubber, coins, feathers, leather, etc. that are not drawn to iron. Magnet characteristics It pulls magnetic materials, such as iron. The magnet's two ends are referred to as its poles. The magnet's diametrically opposed poles are drawn together. Heating, hammering, or dropping causes it to lose its characteristics. On the basis of properties types of Magnets Temporary magnets are those magnets that are magnetic for only a little duration. Typically, iron, cobalt, or nickel are used to make them. When they are close to the powerful magnet, they act like a magnet. When they are yanked away from the powerful magnet, they stop being magnetic. Permanent magnets are magnets that have magne...
Post a Comment
Read more

Class 3 English Practice Grammar Worksheet -The Adverb

 Class 3 English Practice Grammar Worksheet -The Adverb Class 3 English – The Adverb – Kinds of Adverb Fill in the blanks with suitable Adverbs of place. Choose from the box.  Up               outside                       everywhere                 back                down      away          here                           there                     ...
Post a Comment
Read more