Tag: the periodic table
Questions Related to the periodic table
Which of the following statements is not true about Dobereiner's law of triads?
In a triad of $A, B, C$ elements if the atomic masses of $A$ and $C$ respectively are $100$ and $200$, then the atomic mass of $B$ is:
In Doberenier triads, the atomic weights of the elements in a triad are in increasing order.
State whether the given statement is true or false.
When a Dobereiner's triad is considered, the sum of atomic weights of the terminal elements $X$ and $Z$ is 162.5. The atomic weight of $Z$ is 50 units less than 5 times that of $X$. Identify the periods of $X, Y$ and $Z$ respectively in the present periodic table.
The early attempts to classify elements were based on:
Which of the following statements are true?
Which is mismatched regarding the position of the elements as given below?
Electronic configuration of silver atom in ground state.
Write True or false:
Neptunium is named after the: