Ionic and Covalent Bonding

What are small particles that make up elements and compounds?

• Molecules

• Atoms

• Photons

• Elements

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The atom is considered the basic building block of matter. Anything that has a mass—in other words, anything that occupies space—is composed of __________.

• atoms

• mixtures

• DNA

• compounds

Tags

NGSS.MS-PS1-1

In chemistry, a compound is:

• an electrically neutral substance consisting of more than one atom.

• The number of atoms of an element are indicated using subscripts.

• a substance made of two or more elements chemically bonded to each other in a fixed ratio.

• Is a constant composition, which means the ratio of different atoms is always the same.

A(n) _____________ consists of two or more different elements joined by chemical bonds such as water (H₂O) and hydrochloric acid (HCl).

• compound

• molecule

• electron cloud

• nucleus

Tags

NGSS.MS-PS1-1

True/False. All compounds are molecules but not all molecules are compounds.

• True

• False

• Trust

Tags

NGSS.MS-PS1-1

A ____________ is the unit of a pure substance, consists of more than one atom, and has a constant composition, which means the ratio of different atoms is always the same.

• electron

• compound

• element

• molecule

Tags

NGSS.MS-PS1-1

Molecules form when two or more atoms form _______________ with each other. It doesn't matter if the atoms are the same or are different from each other.

• mechanical bonds

• physical bonds

• chemical bonds

• common bonds

Tags

NGSS.MS-PS1-1

Molecules made up of two or more elements are called ____________.

• compounds

• atoms

• identical

• ions

Tags

NGSS.MS-PS1-1

A more or less stable grouping of two or more atoms held together by chemical bonds is called a ___________.

• molecule

• compound

Tags

NGSS.MS-PS1-1

When a molecule is made up of two or more atoms of different elements, it is called a ___________.

• molecule

• compound

Tags

NGSS.MS-PS1-1