Saliha Fatima Assignment 4:- Teaching/Learning materials

1) ELECTRONIC CONFIGURATION OF ELEMENTS:-

The electron configuration of an atom is the representation of the arrangement of electrons distributed among the orbital shells and subshells.  Commonly, the electron configuration is used to describe the orbitals of an atom in its ground state, but it can also be used to represent an atom that has ionized into a cation or anion by compensating with the loss of or gain of electrons in their subsequent orbitals. 

Many of the physical and chemical properties of elements can be correlated to their unique electron configurations. The valence electrons, electrons in the outermost shell, are the determining factor for the unique chemistry of the element.https://youtu.be/hSkJzE2Vz_w

2)Factora affecting friction:- 

1. The factors that affect friction are:

(a) the condition of the surfaces in contact

(b) the weight of an object

2. A rough surface produces greater friction compared to a smooth surface.

(a) For example, it is harder to push or pull a heavy box along a carpet than along a tiled surface.

(b) The carpet produces greater frictional force than the tiled surface.

(c) The huge amount of frictin force impedes the box movement, making it very difficult to be moved.

3. We are more likely to slip while walking on a wet floor. This is because the wet floor is slippery and produces less friction.

4. Friction also depands on the weight of an object.

(a) A heavier object exerts a greater frictional force.
(b) Therefore, a bigger and heavier box is more difficult to be moved than a smaller and lighter box.

 

3)HEAT AND TEMPERATURE:-

Kinetic energy: