periodic table

Front

Who discovered the first scientific and systematic periodic table?

Back

Dmitri Mendeleev

Front

What is the correct statement regarding electronegative elements?

Back

For electronegative elements, reactivity increases with decrease in atomic size in the same group.

Front

How many groups are there in the modern periodic table?

Back

18

Front

What happens when we move from top to bottom in a group of the periodic table?

Back

Atomic radius increases.

Front

What does Mendeleev's periodic law state?

Back

Properties of elements are periodic functions of their atomic mass.

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by increasing atomic number.

Front

What is atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the significance of groups in the periodic table?

Back

Elements in the same group have similar chemical properties due to having the same number of valence electrons.

Front

What is the trend in reactivity for alkali metals in the periodic table?

Back

Reactivity increases as you move down the group.

Front

What are periods in the periodic table?

Back

Horizontal rows in the periodic table, indicating the number of electron shells in the elements.