Marcus is trying to learn all about _________. Substances that cannot be broken down into similar substances.

• halogens
• elements

To start, he should probably consult the __________, a chart which lists all these substances.

• Periodic Table of Elements
• groups

Marcus know this chart contains lots of information. First, it will tell him the number of ________, or positively charged subatomic particles, in each atom of a given substance.

• neutrons
• electrons
• protons

Next, it will tell him the substance's ________. This is the average total mass of all the subatomic particles.

• atomic mass
• orbital

The chart, Marcus realizes, is divided into ________, or families, which are organized in vertical columns.

• elements
• groups
• Periodic Table of Elements

While all subatomic particles are important, Marcus knows the most crucial might be___________, or negatively charged particles.

• protons
• neutrons
• electrons

Tags

NGSS.MS-PS2-3

These tiny particles move quickly in a(n)___________, also known as a cloud.

• orbital
• group

Tags

NGSS.MS-PS1-4

Finally, while Marcus understands most substances are categorized as metals, he will be on the lookout for _____________, nonmetals that react easily with many other substances.

• elements
• halogens
• orbitals

Particles called __________ are located in the center of the atom and have no charge.

• protons
• neutrons
• electrons

The _____________is the number of protons in the nucleus of an atom.

• atomic number
• atomic mass