Chemistry Chapter 4 The Structure of an
Atom
The modern periodic table is is arranged by increasing atomic mass of elements. -
Answer T
Aristotle named atoms atoms. - Answer F
A cathode ray tube consists of a stream of protons. - Answer F electrons
In a neutral atom, the number of protons is equal to the number of neutrons. - Answer F
Gamma decay emits energy, but no particles. - Answer T
An alpha particle is the equivalent of a Helium-4 nucleus. - Answer T
Nuclear decay can change one element into another. - Answer T
Isotopes are forms of an element that has the same number of protons, but a different
number of electrons. - Answer F
An input of energy is required in order for nuclear decay to happen in an atom. - Answer
F
Gamma decay is a form of nuclear radiation that consists of energy, not matter. -
Answer T
The stability of a nucleus is determined by the ratio of electrons to protons. - Answer F
The mass of a neutron is approximately equal to the mass of a proton. - Answer T
The modern periodic table is arranged from right to left in order of increasing atomic
mass. - Answer F
Greek philosophers thought that matter was composed of four elements: air, earth, fire,
and water. - Answer T
In the notation 107/47 Ag, 107 represents the atomic number and 47 represents the
atomic mass of silver. - Answer F
Radon is a radioactive substance that undergoes spontaneous emission of radiation
due to its unstable nuclei. - Answer F
Atoms of a radioactive element can change into atoms of another element by emitting
radiation. - Answer T
Atom
The modern periodic table is is arranged by increasing atomic mass of elements. -
Answer T
Aristotle named atoms atoms. - Answer F
A cathode ray tube consists of a stream of protons. - Answer F electrons
In a neutral atom, the number of protons is equal to the number of neutrons. - Answer F
Gamma decay emits energy, but no particles. - Answer T
An alpha particle is the equivalent of a Helium-4 nucleus. - Answer T
Nuclear decay can change one element into another. - Answer T
Isotopes are forms of an element that has the same number of protons, but a different
number of electrons. - Answer F
An input of energy is required in order for nuclear decay to happen in an atom. - Answer
F
Gamma decay is a form of nuclear radiation that consists of energy, not matter. -
Answer T
The stability of a nucleus is determined by the ratio of electrons to protons. - Answer F
The mass of a neutron is approximately equal to the mass of a proton. - Answer T
The modern periodic table is arranged from right to left in order of increasing atomic
mass. - Answer F
Greek philosophers thought that matter was composed of four elements: air, earth, fire,
and water. - Answer T
In the notation 107/47 Ag, 107 represents the atomic number and 47 represents the
atomic mass of silver. - Answer F
Radon is a radioactive substance that undergoes spontaneous emission of radiation
due to its unstable nuclei. - Answer F
Atoms of a radioactive element can change into atoms of another element by emitting
radiation. - Answer T
