This is a simple program to create a rock, paper, scissors game that we used to play in our childhood.Note: This is a simple program and there is no graphical interferencefrom r...
O Love!What do you know of love?Have you my friend ever been in love?To feel so vulnerable and so bar...
Bohr proposed a model of the hydrogen atom in 1911. He proposed two postulates: 1st postulates: An electron cannot revolve around the nucleus in all possible orbits as suggeste...
Check out the Young's Double Slit Experiment Visualization made by Joon Shakya to gain knowledge in a exciting and fun waySwipe to change the view. Click here to view it in sepa...
WAP that allows a user to create and modify an array of size 10. Below is the menu that should be displayed. Clear the arrayInsert element at locationDelete element at locationS...
Four factors that bring about a chemical change are:
> Heat > Catalyst
> Light > Solution
> Pressure > Electricity
In the modern periodic table, the physical & chemical properties of the elements are changed to the periodic function of their atomic numbers instead of atomic weight which solves the problem with isotopes. All isotopes of some element represented by the same atomic number. All the gaps of Mendeleev's periodic table are filled by discovering new elements. The column for inert gases was developed and all groups have sub-groups. In this way, the modern periodic table removes all the demerits of Mendeleev's periodic table.
The atomic weight of an element expressed in grams is called gram atomic weight.
The molecular weight of a substance expressed in grams is called molecular weight.
We know, the properties of f-block elements are similar to the transition metals of d-block, However, their last electron enters count f-orbital. So, f-block elements are kept separately below d-block elements or transitional elements. Hence, these elements are called inner transitional elements.
What are lanthanides and act actinides? Why are they kept or placed at the bottom of the periodic table?
The 14 elements from cerium te lawrencium after lutetium are called lanthanides.
The elements from thorium to lawrencium after actinium are called actinides.
These elements are placed at the bottom of the periodic table because of their similar properties. Lanthanides are rare metals whereas actinides are artificial radioactive metals. They show similar properties to the transitional elements. So, they are placed separately below the transitional elements in blocks of the modem periodic table.