Intro to Mendeleev & Moseley

Front

What did Mendeleev not know about Noble Gases?

Back

Mendeleev didn't know about the Noble Gases because of their inability to react.

Front

Who is known as the father of the periodic table?

Back

Dmitri Mendeleev is known as the father of the periodic table.

Front

What is the significance of Mendeleev's periodic table?

Back

Mendeleev's periodic table organized elements by increasing atomic mass and predicted the existence of undiscovered elements.

Front

What did Moseley contribute to the periodic table?

Back

Moseley redefined the periodic law by arranging elements according to atomic number instead of atomic mass.

Front

Define atomic number.

Back

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

Front

What is the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Front

How did Mendeleev predict the properties of undiscovered elements?

Back

Mendeleev predicted properties of undiscovered elements by identifying gaps in his periodic table and analyzing trends in known elements.

Front

What are Noble Gases?

Back

Noble Gases are a group of elements in Group 18 of the periodic table that are characterized by their lack of reactivity due to having a full valence shell.

Front

Why are Noble Gases considered inert?

Back

Noble Gases are considered inert because they do not readily form chemical bonds with other elements.

Front

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

Back

The main difference is that Mendeleev's table was arranged by atomic mass, while Moseley's table was arranged by atomic number.