Test Bank For Chemistry Chapter 1-21 /
Complete Questions and Answers A+
All atoms are:
a)positively charged, with the number of protons exceeding the number of protons
b) negatively charged, with the number of electrons exceeding the number of protons
c) neutral with the number of protons equaling the number of electrons
d) neutral, with the number of protons equaling the number of electrons, which is equal
to the number of neutrons - answersc) neutral with the number of protons equaling the
number of electrons
The particles that are found in the nucleus of an atom are___.
a) neutrons and electrons
b) electrons only
c) protons and neutrons
d) protons and electrons - answersc) protons and neutrons
Which model of the atom is thought to be true?
a) Protons, electrons, and neutrons are evenly distributed throughtout the volume of the
atom
b) The nucleus is made of protons, electrons, and neutrons
c) Electrons are distributed around the cucleus and occupy almost all the volume of the
atoms
d) The nucleus is made of electrons and protons - answersc) Electrons are distributed
around the cucleus and occupy almost all the volume of the atom
The nucleus of an atom is_____.
a) the central core and is composed of protons and neutrons
b) positively charged and has more protons than neutrons
c) negatively charged and has a high density
d) negatively charged and has a low density - answersa) the central core and is
composed of protons and neutrons
The atomic number of an element is the toal number of which particles in the nucleus?
a) neutrons
b) protons
c) electrons
d) protons and electrons - answersb) protons
An element has a n atomic number of 76. The number of protons an electrons in a
neutral atom of the element are__.
a) 152 protons and 76 electrons
b) 76 protons and 0 electrons
c) 38 protons and 38 electrons
,d) 76 protons and 76 electrons - answersd) 76 protons and 76 electrons
The sum of the protons and neutrons in an atom equals the _________.
a) atomic number
b) nucleus number
c) atomic mass
d) mass number - answersd) mass number
What does the number 84 in the krupton 84 represent?
a) the atomic number
b) the mass number
c) atomic mass
d) mass number - answersb) the mass number
All atoms of the same element have the same____.
a) number of neutrons
b) number of protons
c) mass numbers
d) mass - answersb) number of protons
Isotopes of the same element have different
a) number of neutrons
b) number of protons
c) number of electrons
d) atomic number - answersa) number of neutrons
The smallest particle of an element that retains the properties of that element is a(n)
a) atom
b) electron
c) proton
d) neutron - answersa) atom
Dalton's atomic theory included which idea?
a) All atoms of all elements are the same size
b) Atoms of different elements always combine in one-to-one ratios
c) Atoms of the same element ar always identical
d) Individual atoms can be seen iwth a microscope - answersc) Atoms of the same
element are always identical
Whcih discovery did J.J. Thomson make that improved upon Dalton's atomic theory?
a) Atoms contain tiny, negatiely charged electrons
b) Atoms are always in motion
c) Atoms contian a tiny, positivey charged nucleus
d) Atoms that ocmbine do so in siple whole-number ratio - answersa) Atoms contain
negatively charged electrons
, Which of the following was originally a tenet of Dalton's atomic theory, but had to be
revised about a century ago?
a) Atoms are tiny indivisible particles
b) The atoms of any one element are different from thouse of any other element
c) Compunds are made by combining atoms
d) Atoms of different elements can combine with one another in simple whole number
ratios - answersd) Atoms of different elements can combine with one another is simple
whole number ratios
The comparison of the number of atoms in a copper coin the size of a penny with the
number of people on Earth is used to illustrate which of the following?
a) that atoms are indivisible
b) that atoms are very small
c) that atoms are very large
d) that in a copper penny, ther is one atom for every person on Earth - answersb) that
atoms are very small
Which of the following is true about subatomic particles?
a) Electrons are negatively charged and are the heaviest subatomic particle
b) Proton are positively charged and the lightest subatomic particle
c) Neutrons have no charge and are the lightest subatomic particle
d) The mass of a neutron nearlky equals the mass of a proton - answersd) the mass of
a neutron nearly equals the mass of a proton
Who conducted expriments to determine the quanity of charge carried by an electron?
a) Rutherford
b) Millikan
c) Dalton
d) Thomson - answersb) Millikan
What is relative mass of an electron?
a)1/1840 the mass of a hydrogen atom
b) 1/1840 the mass of neutron + proton
c) 1/1840 the mass of a C-12 atom
d) 1/1840 the mass fo an alpha particle - answersa) 1/1840 the mass of a hydrogen
atom
The mass number of an element is equal to ______.
a) the total number of electrons in the nucleus
b) the total number of protons and neutrons in the nucleus
c) less than twice the atomic number
d) a constant number for the lighter elements - answersb) the total number of protons
and neutrons in the nucleus
Using the periodic table determine the number f neutrons in 16-O
a) 4
Complete Questions and Answers A+
All atoms are:
a)positively charged, with the number of protons exceeding the number of protons
b) negatively charged, with the number of electrons exceeding the number of protons
c) neutral with the number of protons equaling the number of electrons
d) neutral, with the number of protons equaling the number of electrons, which is equal
to the number of neutrons - answersc) neutral with the number of protons equaling the
number of electrons
The particles that are found in the nucleus of an atom are___.
a) neutrons and electrons
b) electrons only
c) protons and neutrons
d) protons and electrons - answersc) protons and neutrons
Which model of the atom is thought to be true?
a) Protons, electrons, and neutrons are evenly distributed throughtout the volume of the
atom
b) The nucleus is made of protons, electrons, and neutrons
c) Electrons are distributed around the cucleus and occupy almost all the volume of the
atoms
d) The nucleus is made of electrons and protons - answersc) Electrons are distributed
around the cucleus and occupy almost all the volume of the atom
The nucleus of an atom is_____.
a) the central core and is composed of protons and neutrons
b) positively charged and has more protons than neutrons
c) negatively charged and has a high density
d) negatively charged and has a low density - answersa) the central core and is
composed of protons and neutrons
The atomic number of an element is the toal number of which particles in the nucleus?
a) neutrons
b) protons
c) electrons
d) protons and electrons - answersb) protons
An element has a n atomic number of 76. The number of protons an electrons in a
neutral atom of the element are__.
a) 152 protons and 76 electrons
b) 76 protons and 0 electrons
c) 38 protons and 38 electrons
,d) 76 protons and 76 electrons - answersd) 76 protons and 76 electrons
The sum of the protons and neutrons in an atom equals the _________.
a) atomic number
b) nucleus number
c) atomic mass
d) mass number - answersd) mass number
What does the number 84 in the krupton 84 represent?
a) the atomic number
b) the mass number
c) atomic mass
d) mass number - answersb) the mass number
All atoms of the same element have the same____.
a) number of neutrons
b) number of protons
c) mass numbers
d) mass - answersb) number of protons
Isotopes of the same element have different
a) number of neutrons
b) number of protons
c) number of electrons
d) atomic number - answersa) number of neutrons
The smallest particle of an element that retains the properties of that element is a(n)
a) atom
b) electron
c) proton
d) neutron - answersa) atom
Dalton's atomic theory included which idea?
a) All atoms of all elements are the same size
b) Atoms of different elements always combine in one-to-one ratios
c) Atoms of the same element ar always identical
d) Individual atoms can be seen iwth a microscope - answersc) Atoms of the same
element are always identical
Whcih discovery did J.J. Thomson make that improved upon Dalton's atomic theory?
a) Atoms contain tiny, negatiely charged electrons
b) Atoms are always in motion
c) Atoms contian a tiny, positivey charged nucleus
d) Atoms that ocmbine do so in siple whole-number ratio - answersa) Atoms contain
negatively charged electrons
, Which of the following was originally a tenet of Dalton's atomic theory, but had to be
revised about a century ago?
a) Atoms are tiny indivisible particles
b) The atoms of any one element are different from thouse of any other element
c) Compunds are made by combining atoms
d) Atoms of different elements can combine with one another in simple whole number
ratios - answersd) Atoms of different elements can combine with one another is simple
whole number ratios
The comparison of the number of atoms in a copper coin the size of a penny with the
number of people on Earth is used to illustrate which of the following?
a) that atoms are indivisible
b) that atoms are very small
c) that atoms are very large
d) that in a copper penny, ther is one atom for every person on Earth - answersb) that
atoms are very small
Which of the following is true about subatomic particles?
a) Electrons are negatively charged and are the heaviest subatomic particle
b) Proton are positively charged and the lightest subatomic particle
c) Neutrons have no charge and are the lightest subatomic particle
d) The mass of a neutron nearlky equals the mass of a proton - answersd) the mass of
a neutron nearly equals the mass of a proton
Who conducted expriments to determine the quanity of charge carried by an electron?
a) Rutherford
b) Millikan
c) Dalton
d) Thomson - answersb) Millikan
What is relative mass of an electron?
a)1/1840 the mass of a hydrogen atom
b) 1/1840 the mass of neutron + proton
c) 1/1840 the mass of a C-12 atom
d) 1/1840 the mass fo an alpha particle - answersa) 1/1840 the mass of a hydrogen
atom
The mass number of an element is equal to ______.
a) the total number of electrons in the nucleus
b) the total number of protons and neutrons in the nucleus
c) less than twice the atomic number
d) a constant number for the lighter elements - answersb) the total number of protons
and neutrons in the nucleus
Using the periodic table determine the number f neutrons in 16-O
a) 4
