ELED 303 EXAM QUESTIONS WITH CORRECT
ANSWERS
/. Best definition of chemistry: - Answer-The study of matter and the reactions between
matter
/.What can you tell from the amount of bonds in compound between two atoms? -
Answer-How strong the bonds are
/.New scientific theories are created through what? - Answer-The scientific method
/.A Theory is NOT proven to be 100% true, but is the world's best explanation for
something at the current time, true or false? - Answer-True
/.A law is something that has been scientifically proven to be 100% true through
experimentation, true or false? - Answer-True
/.Atom comes from the Greek word Atomos, which means what? - Answer-Uncuttable
/.True or false, an Element can be divided into smaller pieces? - Answer-False
/.Which of the following was NOT one of John Dalton's assumptions of the atomic
model? - Answer-Elements are the building blocks of life
/.Which of the following is not a subatomic particle? - Answer-Photon
/.Select all particles needed to find out the atomic mass (mass number).
Photon
Proton
Electron
Neutron - Answer-Photon
Proton
Electron
Neutron
/.Two atoms of the same element with different atomic masses are called what? -
Answer-Isotope
/.True or false, positively charged atoms are called anions, and negatively charged
atoms are called cations? - Answer-False
, /.If an uncharged atom has 11 electrons, what element is it? - Answer-Sodium
/.What is the unit given to Avogadro's Number (6.022 x 10^23)? - Answer-Mole
/.How many atoms are in 120 grams of Calcium? - Answer-18 x 10^23 atoms
/.If an atom were the size of a football field, the nucleus would be about the size of a
baseball at the center of the field, and the electrons would be the size of _______
around the outside of the field. - Answer-A grain of sand
/.What scientist is credited with creating the first model of the electronic structure of
atoms? - Answer-Niels Bohr
/.In a Wave Model, how many quantum numbers does each electron have? - Answer-3
/.In a Bohr Model, each electron has how many quantum numbers? - Answer-1
/.True or false, the Pauli Exclusion Principle states that there must be a fourth quantum
number to account for spin of the electron? - Answer-True
/.True or false, Ionic Bonds form as a result of two elements equally sharing electrons? -
Answer-False
/.True or false, covalent bonds take place between nonmetals and other nonmetals? -
Answer-True
/.C6H12O6 is an example of what kind of formula? - Answer-Molecular
/.CH is an example of what kind of formula? - Answer-Empirical
/.H-O-H is an example of what kind of formula? - Answer-Structural
/.Electrons in the outermost shell of an atom are called what? - Answer-Valence
Electrons
/.True or false, the picture above is an example of a Lewis Dot Diagram? - Answer-True
/.In a Lewis Dot Diagram, a line between two atoms represents what? - Answer-1
electron from each atom on the end of the line, both of which are being shared by the
two atoms
/.How many electrons do elements want to keep in their outermost shell in order to be
the most stable? - Answer-8
/.By looking at the periodic table, what tells you how many valence electrons are in an
element? - Answer-The element's column
ANSWERS
/. Best definition of chemistry: - Answer-The study of matter and the reactions between
matter
/.What can you tell from the amount of bonds in compound between two atoms? -
Answer-How strong the bonds are
/.New scientific theories are created through what? - Answer-The scientific method
/.A Theory is NOT proven to be 100% true, but is the world's best explanation for
something at the current time, true or false? - Answer-True
/.A law is something that has been scientifically proven to be 100% true through
experimentation, true or false? - Answer-True
/.Atom comes from the Greek word Atomos, which means what? - Answer-Uncuttable
/.True or false, an Element can be divided into smaller pieces? - Answer-False
/.Which of the following was NOT one of John Dalton's assumptions of the atomic
model? - Answer-Elements are the building blocks of life
/.Which of the following is not a subatomic particle? - Answer-Photon
/.Select all particles needed to find out the atomic mass (mass number).
Photon
Proton
Electron
Neutron - Answer-Photon
Proton
Electron
Neutron
/.Two atoms of the same element with different atomic masses are called what? -
Answer-Isotope
/.True or false, positively charged atoms are called anions, and negatively charged
atoms are called cations? - Answer-False
, /.If an uncharged atom has 11 electrons, what element is it? - Answer-Sodium
/.What is the unit given to Avogadro's Number (6.022 x 10^23)? - Answer-Mole
/.How many atoms are in 120 grams of Calcium? - Answer-18 x 10^23 atoms
/.If an atom were the size of a football field, the nucleus would be about the size of a
baseball at the center of the field, and the electrons would be the size of _______
around the outside of the field. - Answer-A grain of sand
/.What scientist is credited with creating the first model of the electronic structure of
atoms? - Answer-Niels Bohr
/.In a Wave Model, how many quantum numbers does each electron have? - Answer-3
/.In a Bohr Model, each electron has how many quantum numbers? - Answer-1
/.True or false, the Pauli Exclusion Principle states that there must be a fourth quantum
number to account for spin of the electron? - Answer-True
/.True or false, Ionic Bonds form as a result of two elements equally sharing electrons? -
Answer-False
/.True or false, covalent bonds take place between nonmetals and other nonmetals? -
Answer-True
/.C6H12O6 is an example of what kind of formula? - Answer-Molecular
/.CH is an example of what kind of formula? - Answer-Empirical
/.H-O-H is an example of what kind of formula? - Answer-Structural
/.Electrons in the outermost shell of an atom are called what? - Answer-Valence
Electrons
/.True or false, the picture above is an example of a Lewis Dot Diagram? - Answer-True
/.In a Lewis Dot Diagram, a line between two atoms represents what? - Answer-1
electron from each atom on the end of the line, both of which are being shared by the
two atoms
/.How many electrons do elements want to keep in their outermost shell in order to be
the most stable? - Answer-8
/.By looking at the periodic table, what tells you how many valence electrons are in an
element? - Answer-The element's column
