Unit 5: Electron Configuration Review

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does an atom with the electron configuration 1s²2s²2p⁴ have?

Back

5

Front

What is a p block element?

Back

P block elements are those found in groups 13 to 18 of the periodic table, characterized by the filling of p orbitals.

Front

Which element is a p block element: Ca, Ar, Re, Au?

Back

Ar (Argon) is a p block element.

Front

How many d orbitals are present in a d sublevel?

Back

There are 5 d orbitals in a d sublevel.

Front

What is the electron configuration for an oxygen atom?

Back

1s²2s²2p⁴

Front

What is the first step in writing electron configurations?

Back

Start with the 1s² orbital.

Front

What is the maximum number of electrons that can occupy a single orbital?

Back

A single orbital can hold a maximum of 2 electrons.

Front

What is the Aufbau principle?

Back

The Aufbau principle states that electrons occupy the lowest energy orbitals first before filling higher energy levels.

Front

What is Hund's rule?

Back

Hund's rule states that electrons will fill degenerate orbitals singly before pairing up.