Atoms And Molecules Question Preview (ID: 5467)
Atoms Molecules And The Periodic Table.
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Because atoms are so small?
a) Scientists create models to describe them.
b) They cannot be made of smaller particles.
c) There is no way to describe them.
d) They can not be synthesized by scientists.
Whichis the smallest particle of matter?
a) Atom
b) Molecule
c) compound
d) Solid
What happens if new evidence is discovered about atoms that current theories about atoms do not explain?
a) Nothing, current theories about atoms are hypothesis and do not need to be supported by new evidence
b) Nothing, current theories about atoms are scientists’ best idea, so those theories remain valid.
c) Current theories about atoms will be modified in light of new evidence.
d) Current theories about atoms will be abandoned for a new theory.
Which is to small to view using a microscope?
a) An atom
b) A cell
c) A single human hair
d) A leukocyte
Describe the Thomson model of the atom.
a) has a distinct nucleus, empty space and protons.
b) A round ball, of different sizes depending on the element.
c) Distinct orbits of electrons.
d) Plum pudding model
Which particle is not part of an atom?
a) Proton
b) Negitron
c) Electron
d) Neutron
In a neutral atom, the number of protons equals the number of?
a) Nuclei
b) Electrons
c) Neutrons
d) Positrons
Describe the Bohr model fo the atom.
a) Has a distinct nucleus, empty space and protons.
b) A round ball, different sizes depending on the element.
c) Distinct orbits of its electrons.
d) Plum pudding model.
What information on the periodic table indicates the number of protons in an element?
a) The position of the element in its column.
b) The element's chemical symbol.
c) The elements atomic number.
d) The elements atomic mass.
What describes the isotope of carbon?
a) Has sixteen protons, neutrons and electrons.
b) Has six protons but different number of neutrons.
c) Isotopes have a greater number of protons.
d) Carbon does not have any Isotopes and is not radioactive.
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