Name the scientist who stated the modern periodic law.

One Line Answer

Henry Moseley stated the modern periodic law.

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Chapter 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [Page 5]

Chapter 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 1. (ii) | Page 5

What are the periods in a periodic table? Give two characteristics of each.

Name two elements in each case: Lanthanides

Name an alkali metal in period 3 and halogen in period 2.

What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?

Find the odd one out and give its explanation.

Complete the following flow chart.

In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.

Distinguish between:

Group 17 - Group 18

The inert gas which lies in the third period is ______

Spot the error:

The elements of group 13 are called the carbon family.