History of the Periodic Table

Front

What is the atomic weight of Beryllium (Be) according to Mendeleev's Periodic Table?

Back

9.4

Front

What was Henry Moseley's major contribution to the Periodic Table?

Back

He arranged elements by atomic number instead of atomic mass.

Front

In which decade did Antoine Lavoisier compile a list of known elements?

Back

1790s

Front

What is the periodic law primarily based on?

Back

Atomic number.

Front

Which element is directly before Californium (Cf) in the Actinide series?

Back

Berkelium (Bk).

Front

Who is known as the father of modern chemistry?

Back

Antoine Lavoisier.

Front

What is the significance of atomic number in the periodic table?

Back

It determines the position of an element in the periodic table and its chemical properties.

Front

What did Mendeleev predict about undiscovered elements?

Back

He predicted the existence and properties of undiscovered elements based on gaps in his periodic table.

Front

What is the main difference between Mendeleev's and Moseley's periodic tables?

Back

Mendeleev's table was arranged by atomic mass, while Moseley's was arranged by atomic number.

Front

What are the two main categories of elements in the periodic table?

Back

Metals and nonmetals.