Chemistry Middle School

the basic unit of a chemical element

• Atom 
• Matter 
• Neutron 
• Element 

Tags

NGSS.MS-PS1-1

The central part of an atom that contains the protons and neutrons

• Neutron  
• Atom 
• Nucleus
• Metal

subatomic particle found in the nucleus of atoms that differs from the other subatomic particles

• Atom
• Proton
• Electron
• Neutron

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-8

subatomic particle found in the nucleus of every atom. The particle has a positive electrical charge, equal and opposite to that of the electron

• Atom
• Proton 
• Neutron 
• Electron

Tags

NGSS.HS-PS1-8

smallest of the particles that make up an atom, and they carry a negative charge

• Neuton
• Element 
• Electron 
• Proton

the number of protons in the nucleus of an atom

• Mass Number 
• Indicator
• Chemical Symbol
• Atomic Number

is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus

• Mass Number 
• Atomic Number
• Indicator
• Chemical Symbol

a substance consisting of atoms which all have the same number of protons

• Mass Number 
• Elment 
• Element
• Atom

an abbreviation or short representation of an element name 

• Atomic number 
• Chemical Symbol

An arrangement of elements in order of increasing atomic numbers that demonstrates the periodic patterns that occur among the elements.

• Atomic number
• periodic table
• Elements
• Atomic mass