Atoms Vocabulary

What is an Atom?

• Building block of elements

• Neutron

• Unit of mass

• Atomic mass unit

Tags

NGSS.MS-PS1-1

Atomic Mass

• Average number of different masses

• Mass of an atom = to the number of protons and neutrons

• 1 amu

• The SI atomic unit in a cell

Tags

NGSS.MS-PS1-1

Atomic Number

• The number of Atoms in a cell.

• The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

• The atomic symbol that is on the periodic table.

• Electron cloud in an Atom.

Tags

NGSS.MS-PS1-1

Electron

• Negatively charged particle that spins around the outside of the nucleus.

• Positively charged particle that spins around the outside of the nucleus.

• Neutrally charged particle that spins around the outside of the nucleus.

• None of the above

Tags

NGSS.MS-PS2-3

Electron Cloud

• Building blocks of elements.

• Unit of mass used to express atomic and molecular weights.

• The area around an atom's nucleus where electrons are most likely to be found. 

• Particle of matter that defines a chemical element.

Tags

NGSS.MS-PS1-1

Isotope

• Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons.

• Element on the periodic table.

• The center of a cell.

• Particle that makes up an atom (protons, electrons, neutrons).

Mass Number

• The total number of electrons and cells in an atom.

• Cells

• Atoms

• The total number of protons and neutrons in an atom.

Tags

NGSS.MS-PS1-5

Neutron

• Negative charge

  The area around an atom's nucleus where electrons are most likely to be found. 

• Subatomic particle of about the same mass as a proton but without an electric charge.

  Neutral Charge

• Positive charge

  Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons.

• None of the above.

Nucleus

• The area around an atom's nucleus where electrons are most likely to be found. 

• Particle that makes up an atom (protons, electrons, neutrons).

• All of the aboive

• Small, dense region consisting of protons and neutrons at the center of an atom.

Proton

• The area around an atom's nucleus where electrons are most likely to be found. 

• Negative charge

• positive electrical charge, equal and opposite to that of the electron.

• Mass