Unit 6 Electron Orbitals Review

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What are valence electrons?

Back

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

Front

Which element has 8 valence electrons?

Back

Neon has 8 valence electrons.

Front

What is the electron configuration for Magnesium?

Back

The electron configuration for Magnesium is 1s² 2s² 2p⁶ 3s².

Front

What is a dot diagram?

Back

A dot diagram (or Lewis dot structure) represents the valence electrons of an atom as dots around the element's symbol.

Front

What is the atomic number of an element?

Back

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

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

What is the electron configuration for Helium?

Back

The electron configuration for Helium is 1s².

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus.