Week 12 Unit 4

Atoms are the ____ unit of ordinary matter that forms a chemical element.

The ____ that hold atoms together are called chemical bonds.

The type of chemical ____ formed between atoms depends on what type of elements the atoms are.

When metal atoms transfer electrons to nonmetal atoms during a chemical reaction, a (an) ___ bond is formed.

A _____ bond is formed when two nonmetal atoms share electrons. This forms a unit called a molecule.

A covalent bond is a chemical bond that is formed when two nonmetal atoms ___ one or more pairs of electrons.

The ____ rule we remember states that atoms will continue to form chemical bonds until they reach a stable outer shell of 8 electrons.

______ has the chemical formula H₂O. This means that a molecule of water has one oxygen atom and two hydrogen atoms.

A molecule of oxygen contains two oxygen atoms that each have ____ valence electrons.

Oxides are compounds that contain ____ and another element.