SKU1013 History of Atom

What is Niels Bohr responsible for discovering?

• That electrons are inside the nucleus
• That electrons are in fixed orbits around the nucleus
• That electrons are small
• That electrons are negative

What was JJ Thomson responsible for finding?

• protons
• neutrons
• nucleus
• electrons

Ernest Rutherford discovered that the atom was mostly _________________ and has a _______________ charged nucleus.

• empty space, positively
• empty space, negatively
• full of protons, positively
• full of neutrons, negatively

Tags

NGSS.HS-PS1-8

If an atom has extra neutrons, it is called a?

• Isotope
• Ion
• Cation
• Anion

Tags

NGSS.HS-PS1-8

The first person to ever talk about an atom was

• Democritus

• Rutherford

• Dalton

• Bohr

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

Tags

NGSS.MS-PS1-1

Who is credited with the Atomic Theory?

• Dalton

• Thomson

• Bohr

• Democritus

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

What are the names of the particles in the nucleus?

• protons and neutrons
• protons and electrons
• photons and neutrons
• nucleons and protons

Tags

NGSS.MS-PS1-1

Which model involved gold foil?

• Thomson Model
• Rutherford Model
• Cloud Model
• Bohr Model