Atomic Structure

Subatomic particles with a negative charge and no mass.

• Electrons

• Neutrons

• Protons

• Quarks

subatomic particles found on the outermost shell & responsible for the atom's reactivity

• neutrons
• valence electrons
• isotopes
• ions

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Tags

NGSS.HS-PS1-8

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

Where electrons are likely to be found as they travel around the nucleus

• Nucleus
• Electron Cloud
• Within a Proton
• Within a Neutron

Tags

NGSS.MS-PS1-1

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

Tags

NGSS.HS-PS1-8

Which of the following did Rutherford NOT conclude from his Gold Foil Experiment?

• The atom is mostly empty space

• The nucleus has a positive charge

• The nucleus is dense and at the center of an atom

• Electrons exist within the nucleus of an atom

These will determine what element an atom is. 

• number of neutrons
• number of electrons
• number of atoms 
• number of protons 

Tags

NGSS.MS-PS1-1

This is how you find the number of neutrons in an atom. 

• Subtract the atomic number from the atomic mass
• Subtract the atomic mass from the atomic number 
• Add the atomic mass to the atomic number 
• Divide the atomic mass by the atomic number 

Tags

NGSS.MS-PS1-1