Atom and PT

The smallest particle of an element that retains all the properties of that element. Contains protons neutrons and electrons.

• Atom

• Electron

• Proton

• Neutron

A subatomic particle with a charge of negative electricity, found in all atoms.

• Atom

• Electron

• Proton

• Neutron

A subatomic particle occurring in all atomic nuclei, with a positive electric charge.

• Atom

• Electron

• Proton

• Neutron

A subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except ordinary hydrogen.

• Atom

• Electron

• Proton

• Neutron

- is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford.

• Element

• Nucleus

• Atomic Mass

• Atomic Number

- cannot be broken down into simpler substances and are primary constituents of matter.

• Element

• Nucleus

• Atomic Mass

• Atomic Number

- of an atom of a chemical element expressed in amu. It is approximately equal to the number of protons and neutrons in the atom.

• Element

• Nucleus

• Atomic Mass

• Atomic Number

- 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.

• Element

• Nucleus

• Atomic Mass

• Atomic Number

-two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties.

• Element

• Nucleus

• Daltons Atomic Theory

• Isotope

-proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.

• Element

• Nucleus

• Daltons Atomic Theory

• Isotope