Week 12 Unit 4

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

• heaviest

• largest

• smallest

• most dense

Tags

NGSS.MS-PS1-1

The ____ that hold atoms together are called chemical bonds.

• alkalis

• forces

• acids

• bases

Tags

NGSS.MS-PS1-5

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

• bond

• fusion

• charge

• incision

Tags

NGSS.HS-PS1-1

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

• metallic

• covalent

• ionic

• bionic

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

• bionic

• covalent

• ionic

• metallic

Tags

NGSS.MS-PS1-1

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

• separate

• transfer

• split

• share

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

• octet

• triad

• ionic

• covalent

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

• Water

• Peroxide

• Carbon Dioxide

• Carbon

Tags

NGSS.MS-PS1-1

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

• two

• five

• six

• three

Tags

NGSS.MS-PS1-1

Oxides are compounds that contain ____ and another element.

• boron

• carbon

• hydrogen

• oxygen