NATURAL SCIENCE FINAL EXAM
When two atoms link up we call that - ANSa chemical bond
the most stable configurations of electrons occur in which of the following cases? -
ANSelements that are inert gases
in many instances, the formation of a chemical bond leads to which of the following cases? -
ANSa configuration in which electrons rearrange in favor of least energy
the spontaneous formation of new chemical bonds usually leads to the emission of energy in the
form of heat because of which of the following reasons? - ANSvalence electrons go from higher
energy states to lower energy states
because a neutral sodium atom has 11 electrons, sodium is - ANSa highly reactive element
an ionic bond forms when which of the following happens - ANSan atom that likes to give up an
electron interacts with an atom that likes to take electrons
which of the following is not correct about one difference between an ionic bond and a metallic
bond? - ANSan ionic bond involves odd numbers of atoms that are loosely bound to one
another, versus a metallic bond, which ahs an even number of atoms and a strong bond
because of the distribution of electrical charges in metals, metals tend to be - ANSmalleable
the covalent bond is like the ionic bond because of _________ and it is like the metallic bond
because of __________ - ANSthe relatively few number of atoms involved, the sharing of
electrons
an atom is capable of making very complicated, covalently-bonded molecules is - ANScarbon
which of the following statements about the hydrogen bond is accurate - ANSits one way in
which covalently bonded molecules attract each other
the surface temperature of the sun is approximately 5800 K. suppose you heat a sample of
hydrogen to more than that temperature. What is the most likely result? - ANSthe gas
transforms into a different state of matter
why does it take more energy to boil water into steam than to melt number of water atoms in the
form of ice into liquid water? - ANSboiling water has more thermal energy to begin with than
melting ice
, a reaction that happens spontaneously will likely have which of the following characteristics? -
ANSthe electrons will be in a lower energy state in the products than in the reactants
which kind of reaction is 2HNO3+Mg(OH)--> 2H20+ MG(NO3)2 - ANSAcid-Base
compounds of what element may be released into the atmosphere upon burning of fossil fuels
and lead to formation of acid rain - ANSsulfur
if one were to conduct a cutting experiment like that described by Democritus wherein he
envisioned cutting paper into smaller and smaller pieces using the worlds sharpest knife, what
would the smallest identifiable bit of paper be? - ANSa molecule
if you use an electrical current to break down water, you get what two gases? - ANShydrogen
and oxygen
how many elements make up most of the earths mass? - ANSsix
why will a grain of pollen placed in water move about erratically? - ANSin a sufficiently short
period of time, the number of water molecules bumping into it from all the sides is not the same
what was one of the original motivations for grouping the elements in columns? - ANSthey are
grouped according to similar chemical behavior
the atomic number of an element best corresponds to which of the following? - ANSthe number
of protons in the nucleus of the atom of that element
how is the organization of the periodic table of elements related to the number of electrons in
the outermost shell of the atom? - ANSa different row in the periodic table corresponds to a
different shell
what was the first constituent of an atom to be discovered? - ANSelectron
in rutherfords gold foil experiment, how did Rutherford know that his alpha particles that are
scattered at large angles did not simply interact with an electron? - ANSelectrons are much less
massive than alpha particles
what is emitted when a hydrogen atom goes from an excited state to the ground state? - ANSa
photon
one significant difference between matter waves and electromagnetic waves is which of the
following - ANSelectromagnetic waves can travel through nothing at all.. it can travel through a
vacuum
an electromagnetic wave cannot arise directly from which of the following? - ANSa sound wave
When two atoms link up we call that - ANSa chemical bond
the most stable configurations of electrons occur in which of the following cases? -
ANSelements that are inert gases
in many instances, the formation of a chemical bond leads to which of the following cases? -
ANSa configuration in which electrons rearrange in favor of least energy
the spontaneous formation of new chemical bonds usually leads to the emission of energy in the
form of heat because of which of the following reasons? - ANSvalence electrons go from higher
energy states to lower energy states
because a neutral sodium atom has 11 electrons, sodium is - ANSa highly reactive element
an ionic bond forms when which of the following happens - ANSan atom that likes to give up an
electron interacts with an atom that likes to take electrons
which of the following is not correct about one difference between an ionic bond and a metallic
bond? - ANSan ionic bond involves odd numbers of atoms that are loosely bound to one
another, versus a metallic bond, which ahs an even number of atoms and a strong bond
because of the distribution of electrical charges in metals, metals tend to be - ANSmalleable
the covalent bond is like the ionic bond because of _________ and it is like the metallic bond
because of __________ - ANSthe relatively few number of atoms involved, the sharing of
electrons
an atom is capable of making very complicated, covalently-bonded molecules is - ANScarbon
which of the following statements about the hydrogen bond is accurate - ANSits one way in
which covalently bonded molecules attract each other
the surface temperature of the sun is approximately 5800 K. suppose you heat a sample of
hydrogen to more than that temperature. What is the most likely result? - ANSthe gas
transforms into a different state of matter
why does it take more energy to boil water into steam than to melt number of water atoms in the
form of ice into liquid water? - ANSboiling water has more thermal energy to begin with than
melting ice
, a reaction that happens spontaneously will likely have which of the following characteristics? -
ANSthe electrons will be in a lower energy state in the products than in the reactants
which kind of reaction is 2HNO3+Mg(OH)--> 2H20+ MG(NO3)2 - ANSAcid-Base
compounds of what element may be released into the atmosphere upon burning of fossil fuels
and lead to formation of acid rain - ANSsulfur
if one were to conduct a cutting experiment like that described by Democritus wherein he
envisioned cutting paper into smaller and smaller pieces using the worlds sharpest knife, what
would the smallest identifiable bit of paper be? - ANSa molecule
if you use an electrical current to break down water, you get what two gases? - ANShydrogen
and oxygen
how many elements make up most of the earths mass? - ANSsix
why will a grain of pollen placed in water move about erratically? - ANSin a sufficiently short
period of time, the number of water molecules bumping into it from all the sides is not the same
what was one of the original motivations for grouping the elements in columns? - ANSthey are
grouped according to similar chemical behavior
the atomic number of an element best corresponds to which of the following? - ANSthe number
of protons in the nucleus of the atom of that element
how is the organization of the periodic table of elements related to the number of electrons in
the outermost shell of the atom? - ANSa different row in the periodic table corresponds to a
different shell
what was the first constituent of an atom to be discovered? - ANSelectron
in rutherfords gold foil experiment, how did Rutherford know that his alpha particles that are
scattered at large angles did not simply interact with an electron? - ANSelectrons are much less
massive than alpha particles
what is emitted when a hydrogen atom goes from an excited state to the ground state? - ANSa
photon
one significant difference between matter waves and electromagnetic waves is which of the
following - ANSelectromagnetic waves can travel through nothing at all.. it can travel through a
vacuum
an electromagnetic wave cannot arise directly from which of the following? - ANSa sound wave
