Atoms

The word electron is derived from a Greek word meaning

The number of protons in a nucleus of an atom is called ______.

Gold foil expt: The dents were seen on

# of protons present in Mo

__________ worked on the conduction of electricity by gases

Energy level

Smallest particles present in the nucleus

# of Protons + # of Neutrons =

Atoms are electrically

Unit of neutrons

Gold foil experiement

Thompson called these particles______.

Mass of electrons

Identify this element

Electrons

Average mass of isotopes =

"Precise velocity or position of objects cannot be always predicted" - ______.

The difference between O and H is that they have a different number of

# of protons present in Au

Planetary model.

Electrons

# of protons present in Hg

# of protons present in N

Mass of neutrons

The space in which electrons move is called an _______

Gold foil expt: Rutherford shot

# of protons present in O

Protons

_____disproved Dalton's atomic theory.

Atom's center

Unit of atomic mass

# of protons present in Ag

# of protons present in Cu

Sub-atomic particles present in the nucleus

Mass of protons

# of protons present in W

Unit of protons

Wave/particle theory

Energy level

Unit of electrons

_____________ coined the term atom

Plum pudding theory

________ make up 99.9% of the mass of the atom

Sub-atomic particles present in an atom are

Gold foil expt:

# of protons present in Mg

# of protons present in U

Protium, Deutrium and Tritium are ___________ of Hydrogen.

_____________ theory later became the foundation of chemistry

_____ concluded that the atom had a concentrated positive center