Chapter 5 ReviewChapter 5 Review
Atomic Theory/ScientistsAtomic Theory/Scientists
Who was the first person Who was the first person to theorize the existence to theorize the existence of the atom in 400 BC?of the atom in 400 BC?
DemocritusDemocritus
Atomic Theory/ScientistsAtomic Theory/Scientists
Who was given credit as Who was given credit as the first person that the first person that proved the nature of proved the nature of atoms?atoms?
John DaltonJohn Dalton
Atomic Theory/ScientistsAtomic Theory/Scientists
According to Dalton’s According to Dalton’s Atomic Theory, all Atomic Theory, all elements are composed elements are composed of tiny indivisible of tiny indivisible particles called_______?particles called_______?
atomsatoms
Atomic Theory/ScientistsAtomic Theory/Scientists
Dalton’s Atomic Theory Dalton’s Atomic Theory stated that atoms of the stated that atoms of the same _______ are same _______ are identical.identical.
elementelement
Atomic Theory/ScientistsAtomic Theory/Scientists
Dalton’s Atomic Theory Dalton’s Atomic Theory was for the most part was for the most part correct, except for the correct, except for the fact that atoms can be fact that atoms can be ________.________.
divideddivided
Atomic Theory/ScientistsAtomic Theory/Scientists
Who is credited with Who is credited with discovering the discovering the electron?electron?
JJ ThomsonJJ Thomson
Atomic Theory/ScientistsAtomic Theory/Scientists
Experiments with Experiments with cathode ray tubes led to cathode ray tubes led to the discovery of the the discovery of the ________.________.
electronelectron
Atomic Theory/ScientistsAtomic Theory/Scientists
The rays produced in the The rays produced in the early cathode ray tube early cathode ray tube experiments were experiments were attracted to a _________ attracted to a _________ charge.charge.
positivepositive
Atomic Theory/ScientistsAtomic Theory/Scientists
JJ Thomson discovered JJ Thomson discovered that electrons have a that electrons have a very_____ mass.very_____ mass.
smallsmall
Atomic Theory/ScientistsAtomic Theory/Scientists
Who discovered the Who discovered the proton?proton?
E. GoldsteinE. Goldstein
Atomic Theory/ScientistsAtomic Theory/Scientists
Who discovered the Who discovered the neutron?neutron?
ChadwickChadwick
Atomic Theory/ScientistsAtomic Theory/Scientists
What happened to most What happened to most of the particles in of the particles in Rutherford’s gold foil Rutherford’s gold foil experiment? experiment?
most passed through the most passed through the foilfoil
Atomic Theory/ScientistsAtomic Theory/Scientists
In Rutherford’s experiment, In Rutherford’s experiment, a few of the positive a few of the positive particles bounced back, so particles bounced back, so what did he concluded what did he concluded they bounced off of?they bounced off of?
a dense positive region a dense positive region called the nucleuscalled the nucleus
Atomic Theory/ScientistsAtomic Theory/Scientists
Who discovered the Who discovered the nucleus?nucleus?
RutherfordRutherford
Atomic Theory/ScientistsAtomic Theory/Scientists
Which experiment did Which experiment did we re-create in lab using we re-create in lab using wooden boards and wooden boards and marbles?marbles?
Rutherford’s gold foil Rutherford’s gold foil experimentexperiment
Subatomic ParticlesSubatomic Particles
Which subatomic Which subatomic particle has a negative particle has a negative charge?charge?
electronelectron
Subatomic ParticlesSubatomic Particles
Which subatomic Which subatomic particle has a positive particle has a positive charge?charge?
protonproton
Subatomic ParticlesSubatomic Particles
Which subatomic Which subatomic particle is neutral?particle is neutral?
neutronneutron
AtomsAtoms
Atoms are electrically Atoms are electrically neutral because the neutral because the number of _________ number of _________ equals the number of equals the number of ___________.___________.
protons equal electronsprotons equal electrons
AtomsAtoms
What is the charge of What is the charge of the nucleus of an atom?the nucleus of an atom?
positive (because the positive (because the protons are positive)protons are positive)
AtomsAtoms
What determines the What determines the identity of an element?identity of an element?
the number of protonsthe number of protons
AtomsAtoms
Isotopes of the same Isotopes of the same element differ in what element differ in what two ways?two ways?
mass number and mass number and number of neutronsnumber of neutrons
AtomsAtoms
What 3 things do What 3 things do isotopes of the same isotopes of the same element have in element have in common?common?
atomic number, number atomic number, number of protons and electronsof protons and electrons
AtomsAtoms
How do you find the How do you find the number of protons for an number of protons for an atom?atom?
same as the atomic same as the atomic numbernumber
AtomsAtoms
How do you find the How do you find the number of neutrons for number of neutrons for an atom?an atom?
mass # - atomic #mass # - atomic #
AtomsAtoms
How do you find the How do you find the number of electrons for number of electrons for an atom?an atom?
same as the atomic same as the atomic numbernumber
AtomsAtoms
All atoms of the same All atoms of the same element have the same element have the same ________ ________.________ ________.
atomic numberatomic number
AtomsAtoms
What element is the What element is the standard for determining standard for determining atomic mass units?atomic mass units?
Carbon - 12Carbon - 12
AtomsAtoms
The average atomic mass The average atomic mass depends on the masses depends on the masses of the isotopes and the of the isotopes and the relative __________ of each relative __________ of each isotope.isotope.
abundanceabundance
AtomsAtoms
What unit is used to What unit is used to measure relative atomic measure relative atomic mass?mass?
amu’samu’s
AtomsAtoms
The atomic mass listed The atomic mass listed on the periodic table is a on the periodic table is a _______ atomic mass._______ atomic mass.
averageaverage
AtomsAtoms
Sodium has atomic Sodium has atomic number 11. If a sodium number 11. If a sodium atom has a mass of 23, atom has a mass of 23, how many protons does it how many protons does it have?have?
11 11 (same as atomic number)(same as atomic number)
AtomsAtoms
Sodium has atomic Sodium has atomic number 11. If a sodium number 11. If a sodium atom has a mass of 23, atom has a mass of 23, how many neutrons does it how many neutrons does it have?have?
1212(subtract mass#-atomic#)(subtract mass#-atomic#)
AtomsAtoms
Sodium has atomic Sodium has atomic number 11. If a sodium number 11. If a sodium atom has a mass of 23, atom has a mass of 23, how many electrons does how many electrons does it have?it have?
1111same as atomic numbersame as atomic number
AtomsAtoms
A carbon atom has 6 A carbon atom has 6 protons, 6 electrons and protons, 6 electrons and 8 neutrons. What is it’s 8 neutrons. What is it’s mass number?mass number?
14 (protons + neutrons)14 (protons + neutrons)
AtomsAtoms
A carbon atom has 6 A carbon atom has 6 protons, 6 electrons and protons, 6 electrons and 8 neutrons. What is it’s 8 neutrons. What is it’s atomic number?atomic number?
6 (same as protons)6 (same as protons)
AtomsAtoms
Hg-200 has an atomic Hg-200 has an atomic number of 80. How number of 80. How many neutrons does it many neutrons does it have?have?
120120
AtomsAtoms
Hg-200 has an atomic Hg-200 has an atomic number of 80. How number of 80. How many protons does it many protons does it have?have?
8080
AtomsAtoms
Hg-200 has an atomic Hg-200 has an atomic number of 80. How number of 80. How many electrons does it many electrons does it have?have?
8080
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