Physical Science Chapter 3
if two grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 14 grams of X to form the same compound
28 grams
which of the following provides the best analogy for an electron in an atomic orbital
a bee trying to escape from a closed jar
which of the following most accurately represents John Dalton's model of the atom
a tiny, solid sphere with a predictable mass for a given element
which statement about subatomic particles is true
an electron has far less mass than either a proton neutron
which statement about electrons and atomic orbitals is not true
an electron has the same amount of energy in all orbitals
the greek philosopher Democritus coined what word for a tiny piece of matter that con not be divided
atom
the number of protons in one atom of an element is that elements
atomic number
to find the number of neutrons in an atom, you would subtract
atomic number from mass number
which of the following is not a part of john daltons atomic theory
atoms contain subatomic particles
in an atomic model that includes a nucleus, positive charge is
concentrated in the center of an atom
J.J. Thomson's experiments provided evidence that an atom
contains negatively charged particles
which subatomic particle has a negative charge
electron
which statement accurately represents the arrangement of electrons in Bohr's atomic model
electrons travel around the nucleus in fixed energies that vary from level to level
who provided evidence for the existence of a nucleus of an atom
ernest rutherford
how was Bohr's atomic model similar to Rutherford's model
it described a nucleus surrounded by a large volume of mass
which statement best describes Rutherford's model of the atom
it is like a huge stadium with a positively charged marble at the center
in Niels Bohr's model of the atom, electrons move
like planets orbiting the sun
the glowing of a neon light is caused by electrons emitting energy as they
move from higher to lower energy levels
the diagram in figure in figure 4-1 shows the results of Rutherford's gold foil experiment. what caused some of the alpha particles to bounce straight back from the gold foil
nuclei in the gold atoms
what do scientists use to predict the locations of electrons in atoms
probability
which statement about subatomic particles is not true
protons and neutrons have the same charge
Democritus thought that matter was made of tiny particles
that could not be divided
what is the difference between an atom in the ground state and an atom in an excited state
the atom in an excited state has more energy and is less stable than the atom in the ground state
what can you assume has happened if an electron moves to a higher energy level
the electron has gained energy
what does the electron cloud model describe
the most likely locations of electrons in atoms
which of the following is unique for each given element
the number of protons
suppose an arom has a mass number of 23. which statement is true beyond any doubt
the number of protons in the nucleus does not equal the number of neutrons
according to john daltons observations, when elements combine in a compound,
the ratio of their masses is always the same
Rutherford's gold foil experiment provided evidence for which of the following statements
there is a dense, positively charged mass in the center of an atom
which statement is true about oxygen-17 and oxygen-18
they are isotopes of oxygen
