Chapter 5 Review. Atomic Theory/Scientists Who was the first person to theorize the existence of the atom in 400 BC? Who was the first person to theorize

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


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


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


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


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


Who is credited with Who is credited with discovering the discovering the electron?electron?

JJ ThomsonJJ Thomson


Experiments with Experiments with cathode ray tubes led to cathode ray tubes led to the discovery of the the discovery of the ________.________.

electronelectron


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


JJ Thomson discovered JJ Thomson discovered that electrons have a that electrons have a very_____ mass.very_____ mass.

smallsmall


Who discovered the Who discovered the proton?proton?

E. GoldsteinE. Goldstein


Who discovered the Who discovered the neutron?neutron?

ChadwickChadwick


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


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


Who discovered the Who discovered the nucleus?nucleus?

RutherfordRutherford


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


Which subatomic Which subatomic particle has a positive particle has a positive charge?charge?

protonproton


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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Chapter 5 Review. Atomic Theory/Scientists Who was the first person to theorize the existence of the atom in 400 BC? Who was the first person to theorize