Chem Unit 3 Review

Front

If an atom gains electrons, what happens to its charge?

Back

The charge will be negative.

Front

What is the maximum number of electrons that an s orbital can hold?

Back

2 electrons.

Front

What occurs when an electron drops from a higher to a lower energy level?

Back

Emission of light from an atom.

Front

How do you represent the valence electrons of an atom in a Lewis dot diagram?

Back

By placing dots around the element's symbol, corresponding to the number of valence electrons.

Front

What does an orbital diagram represent?

Back

The distribution of electrons in an atom's orbitals.

Front

What is the electron configuration for Oxygen?

Back

1s² 2s² 2p⁴.

Front

What is the charge of an ion formed when an atom loses electrons?

Back

The charge will be positive.

Front

What is the principle behind the Aufbau principle in electron configuration?

Back

Electrons fill the lowest energy orbitals first before moving to higher ones.

Front

What is the significance of the Pauli Exclusion Principle?

Back

No two electrons in an atom can have the same set of four quantum numbers.

Front

What is the shape of an s orbital?

Back

Spherical.