Atoms Lesson

The total number of protons and neutrons in the nucleus of an atom

• Atomic Number

• Mass Number

• Atomic Theory

• Electron Cloud

The mass number is always larger than the atomic number (exept for Hydrogen).

• TRUE

• FALSE

The separate atoms that make up a wooden table cannot be seen because the atoms are

• too small

• moving too fast

• packed lightly together

• hidden beneath the surface

Atoms bond together in different ways to make ________________.

• Substances

• Matter

• Molecules

Tags

NGSS.MS-PS1-1

Describes what an atom looks like

• Atomic Number

• Mass Number

• Electron Cloud

• Atomic Theory

all matter is made of what 

• energy 

• atoms 

• electrons 

• compounds 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

the central region of an atom where its neutrons and protons are is its 

• nucleus 

• electron cloud

• core 

• center 

Particles in an atom that are neutral and have no charge are 

• negatrons 

• electrons 

• neutrons 

• protons 

Most of the mass of an atom is found in the ______.

• nucleus

• proton

• electron cloud

• isotope

The smallest particle with characteristics of an element is known as the

• Periodic Table

• Atom

• Proton

• Electron