Mel's Periodic Table Concepts

The video tutorial explains Mel's periodic table, developed by a Russian chemist, which classifies elements based on their atomic masses. It describes how elements are arranged in horizontal rows and vertical columns, with similar properties aligning in groups. Mel's periodic law states that the physical and chemical properties of elements are periodic functions of their atomic masses. The table features seven periods and eight groups, with properties changing gradually across periods.

What was considered the most fundamental property in classifying elements according to Mel?

• Atomic mass

• Atomic number

• Chemical reactivity

• Electronegativity

How did Mel arrange the known elements in his periodic table?

• In alphabetical order

• In increasing order of their atomic masses

• By their chemical reactivity

• By their electronegativity

What is Mel's periodic law?

• The physical and chemical properties of elements are a periodic function of their atomic numbers

• The physical and chemical properties of elements are a periodic function of their atomic masses

• Elements are arranged in order of increasing electronegativity

• Elements are arranged in order of increasing chemical reactivity

What is the tabular arrangement of elements based on Mel's periodic law called?

• Modern periodic table

• Mendeleev's periodic table

• Newlands' periodic table

• Lothar Meyer's periodic table

How many horizontal rows are there in Mel's periodic table?

• Five

• Six

• Seven

• Eight

What are the vertical columns in Mel's periodic table called?

• Series

• Blocks

• Groups

• Periods

How are the groups numbered in Mel's periodic table?

• From 1 to 6

• From 1 to 9

• From 1 to 7

• From 1 to 8

How do the properties of elements in the same period change?

• They change randomly

• They change gradually from left to right

• They change abruptly

• They remain constant