CHS Semester 1 Science Challenge

Front

What is the primary function of valence electrons in chemical reactions?

Back

Valence electrons are involved in forming chemical bonds between atoms.

Front

Distinguish between chemical and physical properties.

Back

Chemical properties involve the ability of a substance to undergo a chemical change, while physical properties involve characteristics like color, density, and melting point.

Front

What type of bond involves the sharing of electron pairs between atoms?

Back

Covalent bond.

Front

The average kinetic energy of the particles of a substance is...

Back

Temperature.

Front

What role do electrons play in chemical bonding?

Back

Electrons in the outer shell are shared or transferred during the formation of chemical bonds.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with distinct properties.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical composition.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Front

What is a metallic bond?

Back

A metallic bond is a type of chemical bond that occurs between metal atoms, characterized by a 'sea of electrons' that are free to move.