Atom History

Which scientist conducted experiments using alpha particles and thin gold foil, which later helped him develop his model for the atom? 

• Ernest Rutherford

• James Chadwick

• Niels Bohr

• John Dalton

Which model of the atom proposed that atoms were positive spheres with negative electrons in them?

• Heliocentric Model

• Solid Sphere Model

• Plum Pudding Model

• Planetary Model

Who proposed the solid sphere model for the atom?

• James Chadwick

• Rutherford

• John Dalton

• Bohr

Which scientist discovered the electron, which helped him develop a model of the atom?

• Niels Bohr

• John Dalton

• Ernst Rutherford

• J.J Thompson

Which experiment did Thompson do?

• Gold Foil

• Cathode Ray

• Discovered TNT

• First dissection

Rutherford’s experiment determined that the nucleus of an atom is tiny, dense and  ______ charged. 

• neutrally

• negatively

• positively

Tags

NGSS.HS-PS1-8

Concluded atoms were made of mostly empty space

• Ernest Rutherford

• John Dalton

• Schrodinger & Heisenberg

• J.J. Thomson

Which of the following are conclusions based on Rutherford's gold foil experiment?

• Most alpha particles passed through the foil because electrons and protons are randomly distributed

• Alpha particle were absorbed by the nucleus because the nucleus consists of protons and electrons e

• Alpha particles were deflected by a small, dense nucleus.

• Alpha particles were deflected because the nucleus and alpha particles are positively charged so they repel each other.

• Most alpha particles passed through the foil because the atom is mostly empty space.

Whose model of an atom is displayed in the picture?

• Thomson

• Rutherford

• Dalton

• Bohr

Each of the following are part of Dalton's atomic theory, which of them are proven to be inaccurate based on our current understanding of the atom?

• In chemical reactions, atoms are combined, separated, or rearranged

• All matter is composed of tiny particles called atoms

• Atoms cannot be created, destroyed, or subdivide.

• Elements combine in fixed ratios to form compounds

• Atoms of the same element are identical in size, shape, and other properties

Tags

NGSS.HS-PS1-7