4.2 Structure Of The Nuclear Atom Answer Key

Question: Dalton theorized that atoms are indivisible, but the discovery of ___ particles changed this theory

Answer: Subatomic

Question: Scientist now know that atoms are made up of electron, which have a ___ charge; ___, which have a positive charge; and ___, which are neutral

Answer: Negative, Protons, Neutrons

Question: The latter two particles are found in the ___ of the atom

Answer: Nucleus

Question: It was ___ who discovered the nucleus of the atom

Answer: Ernest Rutherford

Question: The nucleus, which has a ___ charge, occupies a very small volume of the atom

Answer: Positive

Question: The negatively charged ___ occupy most of the volume of the atom

Answer: Electrons

Question: According to Dalton’s atomic theory, atoms are composed of protons, electrons, and neutrons

Answer: Never True

Question: Atoms of elements are electrically neutral

Answer: Always True

Question: The mass of an electron is equal to the mass of a neutron

Answer: Never True

Question: The charge on all protons is the same

Answer: Always True