Atoms and Elements

The smallest unit of matter that retains the identity of a substance

• atom

• isotope

• proton

• nucleus

Tags

NGSS.MS-PS1-1

Subatomic particle with a negative charge

• proton

• electron

• neutron

• nucleus

Subatomic particle with a positive charge

• proton

• neutron

• electron

• isotope

electrons located on the last shell or energy level of an atom

• isotopes

• valence electrons

• plasma

• element

The smallest part of matter that is identifiable as an element is the —

• atom 

• molecule

• cell

• compound

An atom is the basic unit from which all matter is formed. An element is:

• a charged particle

• a substance that is made up of only one type of atom

• a clothing brand

• a type of molecule

• a substance make up of two or more different types of atoms.

Calculate the number of protons in a neutral atom of sulfur.

• 14

• 16

• 18

• 20

Tags

DOK Level 2: Skill/Concept

Determine the number of electrons in a neutral atom of chlorine.

• 16

• 17

• 18

• 19

Tags

DOK Level 2: Skill/Concept

Which element has the atomic number 1?

• Helium

• Hydrogen

• Oxygen

• Carbon

Elements are the substances that are made up of only ____ type of atom.

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1