Test: Unit 2

Front

How are elements organized in the periodic table?

Back

Elements are organized by atomic number.

Front

What are valence electrons?

Back

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

Front

How many valence electrons does carbon have?

Back

Carbon has 4 valence electrons.

Front

What is an ionic bond?

Back

An ionic bond is formed by the transfer of electrons from one atom to another.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.

Front

What determines the chemical properties of an element?

Back

The chemical properties of an element are determined by its valence electrons.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and determines the element's identity.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the role of neutrons in an atom?

Back

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

Front

What is the outermost shell of an atom called?

Back

The outermost shell of an atom is called the valence shell.