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