Periodic Table and Electron Configuration

Front

What is the atomic radius?

Back

The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons. It generally increases down a group and decreases across a period.

Front

Which element has the largest atomic radius in Group 18?

Back

Radon (Rn) has the largest atomic radius in Group 18.

Front

What is the electron configuration for Aluminum (Al)?

Back

The electron configuration for Aluminum (Al) is 1s² 2s² 2p⁶ 3s² 3p¹.

Front

What is noble gas configuration?

Back

Noble gas configuration is a shorthand notation for electron configurations that uses the electron configuration of the nearest noble gas to simplify the representation.

Front

What is the noble gas configuration for Beryllium?

Back

The noble gas configuration for Beryllium is [He]2s².

Front

What group number are the halogens found in the periodic table?

Back

The halogens are found in Group 17 (7A) of the periodic table.

Front

What is the noble gas configuration for Neon?

Back

The noble gas configuration for Neon is [He]2s² 2p⁶.

Front

How does atomic radius change across a period?

Back

Atomic radius decreases across a period from left to right due to increasing nuclear charge, which pulls electrons closer to the nucleus.

Front

How does atomic radius change down a group?

Back

Atomic radius increases down a group as additional electron shells are added, increasing the distance between the nucleus and the outermost electrons.

Front

What is the significance of electron configuration?

Back

Electron configuration determines the chemical properties of an element, including its reactivity and the types of bonds it can form.