Semester 1 test reg chemistry 2024-2025

Front

What type of bond is formed when atoms share valence electrons?

Back

Covalent bond.

Front

Which group of elements is known for having 8 valence electrons and being the most stable?

Back

Noble gases.

Front

Where do we find the uncertain value in a measurement?

Back

Between the two closest marked values.

Front

True or False: Valence electrons are found closest to the nucleus of an atom.

Back

False.

Front

What is the electron configuration for Chlorine?

Back

[Ne] 3s² 3p⁵.

Front

What is the definition of valence electrons?

Back

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

Front

What type of bond involves the transfer of electrons from one atom to another?

Back

Ionic bond.

Front

What is the significance of the octet rule in chemistry?

Back

Atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving stability.

Front

What are the characteristics of metallic bonds?

Back

Metallic bonds involve a sea of delocalized electrons that allow metals to conduct electricity and heat.

Front

What is the difference between a covalent bond and an ionic bond?

Back

Covalent bonds involve sharing electrons, while ionic bonds involve transferring electrons.