Atomic Theory

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

Tags

NGSS.MS-PS1-1

Who came up with this model of an atom?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick

Tags

NGSS.MS-PS1-1

Contributes basically no mass to an atom.

• protons
• neutrons
• electrons
• protons and neutrons

What element is pictured?

• Hydorgen
• Boron
• Beryllium
• Arsenic

Tags

NGSS.HS-PS1-1

The atomic number for Oxygen is 8, so

• there are 8 protons in the atom
• the atomic mass is less than 8
• the mass of the atom is 8
• the atom is decaying

Tags

NGSS.MS-PS1-1

Which of the following is proposed by Erwin Schrodinger?

• Solar system model of the atom
• Plum pudding model of the atom
• Billiard ball model of the atom
• Electron cloud model of the atom

Discoverer of the neutron?

• Jimmy
• Chadwick
• Charleston
• Rutherford

An atom has a mass of 54 while is atomic number is 32.  How many electrons does it have?

• 22
• 32
• 54
• 0

Tags

NGSS.HS-PS1-1

An atom has a mass of 54 while is atomic number is 32.  How many neutrons does it have?

• 22
• 32
• 54
• 86

Tags

NGSS.MS-PS1-1

J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter
• contains negatively charged particles
• has an overall negative charge
• has an overall positive charge