Week 2 Quiz

Who proposed the first atomic view of matter?

• Lavoisier
• Empedocles
• Democritus
• Priestley

12 grams of carbon react with 32 grams of oxygen to form exactly 44 grams of carbon dioxide. This is a good example of Lavoisier's:

• Law of Definite Proportions

• Atomic Theory

• Law of Conservation of Mass

• Law of Multiple Proportions

Which of the following is NOT a part of Dalton's atomic theory?

• All matter is composed of atoms and empty space

• Atoms are always in motion.

• Atoms of the same element are identical.

• Atoms can't be destroyed...merely re-arranged.

One of Dalton's conclusions concerning his atomic theory was that all atoms of the same element are -

• combined
• different
• reacted
• the same

This scientist discovered a negative particle, he later called an electron, existed in all atoms. The particle has a mass of 1/1837 the mass of a hydrogen atom. Who was the scientist?

• John Dalton

• J J Thomson

• Ernest Rutherford

• Niels Bohr

in 1911, Ernest Rutherford conducted his famous Gold Foil Experiment to test the Plum Pudding Model. He discovered most of the mass was at the center of an atom. This mass was called the ...

• electron.

• proton.

• neutron.

• nucleus.

Ernest Rutherford discovered that the nucleus of the atom contains a positively charged particle called the ....

• proton.

• neutron.

• electron.

• nucleus.

We know know that the atoms contain subatomic particles. Select the subatomic particles that are found in atoms.

• Protons

• Neutrons

• Electrons

• Bosons

• Alpha Particles

Atoms of a single element can contain different number of neutrons, giving them a different mass. What are these differing atoms called?

• Isotopes

• Ions

• Elementals

• Atoms

What does the atomic number represent?

• The number of atoms

• The number of protons

• The number of neutrons

• The mass of one atom