NATURAL SCIENCE FINAL EXAM
When two atoms link up we call that - Answer -a chemical bond
the most stable configurations of electrons occur in which of the following cases? - Answer -elements
that are inert gases
in many instances, the formation of a chemical bond leads to which of the following cases? - Answer -a
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? - Answer -valence electrons go from higher energy
states to lower energy states
because a neutral sodium atom has 11 electrons, sodium is - Answer -a highly reactive element
an ionic bond forms when which of the following happens - Answer -an 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? -
Answer -an 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 - Answer -malleable
, the covalent bond is like the ionic bond because of _________ and it is like the metallic bond because of
__________ - Answer -the relatively few number of atoms involved, the sharing of electrons
an atom is capable of making very complicated, covalently-bonded molecules is - Answer -carbon
which of the following statements about the hydrogen bond is accurate - Answer -its 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? - Answer -the 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? - Answer -boiling water has more thermal energy to begin with than melting ice
a reaction that happens spontaneously will likely have which of the following characteristics? - Answer -
the 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 - Answer -Acid-Base
compounds of what element may be released into the atmosphere upon burning of fossil fuels and lead
to formation of acid rain - Answer -sulfur
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? - Answer -a molecule
if you use an electrical current to break down water, you get what two gases? - Answer -hydrogen and
oxygen
how many elements make up most of the earths mass? - Answer -six
When two atoms link up we call that - Answer -a chemical bond
the most stable configurations of electrons occur in which of the following cases? - Answer -elements
that are inert gases
in many instances, the formation of a chemical bond leads to which of the following cases? - Answer -a
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? - Answer -valence electrons go from higher energy
states to lower energy states
because a neutral sodium atom has 11 electrons, sodium is - Answer -a highly reactive element
an ionic bond forms when which of the following happens - Answer -an 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? -
Answer -an 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 - Answer -malleable
, the covalent bond is like the ionic bond because of _________ and it is like the metallic bond because of
__________ - Answer -the relatively few number of atoms involved, the sharing of electrons
an atom is capable of making very complicated, covalently-bonded molecules is - Answer -carbon
which of the following statements about the hydrogen bond is accurate - Answer -its 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? - Answer -the 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? - Answer -boiling water has more thermal energy to begin with than melting ice
a reaction that happens spontaneously will likely have which of the following characteristics? - Answer -
the 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 - Answer -Acid-Base
compounds of what element may be released into the atmosphere upon burning of fossil fuels and lead
to formation of acid rain - Answer -sulfur
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? - Answer -a molecule
if you use an electrical current to break down water, you get what two gases? - Answer -hydrogen and
oxygen
how many elements make up most of the earths mass? - Answer -six
