Unit 1 Quiz

What did Thomson's atomic theory model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

What did Bohr's atomic theory model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

What did Rutherford discover about atoms?

• An atom is always negatively charged.

• An atom is mostly empty space, but has a dense positively charged center(nucleus).

• An atom is always positively charged.

• All particles will pass straight through gold foil with no change in path.

What is a particle with no charge?

• neutron

• electron

• proton

• atom

What is a negatively charged particle?

• neutron

• electron

• proton

• atom

What two particles would you find in the nucleus of an atom?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Electrons and negatrons

Which scientist discovered the electrons?

• Dalton

• Thomson

• Atristotle

• Bohr

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

• J.J. Tomson

• Ernest Rutherford

• John Dalton

• Democritus

Rutherford and his students did experiments that showed

• Atoms contain negative particles, now called electrons.

• Atoms are mostly empty space.

• Neutrons are located in the nucleus.

• Matter cannot be lost or gained.

All of the following of Dalton's theories were correct EXCEPT - 

• All atoms are identical.

• All matter is made of atoms.

• Chemical reactions rearrange atoms.

• Compounds contain different atoms.