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Physical Science > Unit 3- Atomic Structure > Flashcards

Unit 3- Atomic Structure Flashcards

1
Q

Ernest Rutherford

A

Nuclear Model

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2
Q

Niels Bohr

A

Electrons travel in fixed orbits around the nucleus of the atom

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3
Q

Democritus

A

Named the atom based on the Greek word meaning indivisible

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4
Q

Dmitri Mendeleev

A

Arranged the elements on the periodic table based on atomic mass

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5
Q

Dalton

A

Solid Sphere Model

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6
Q

Schrodinger and Heisenberg

A

Electron Cloud Model

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7
Q

Henry Moseley

A

Arranged the elements on the periodic table based on atomic number

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8
Q

JJ Thomson

A

Plum Pudding Model

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9
Q

Proton

A

A subatomic particle with a positive charge

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10
Q

Neutron

A

The subatomic particle with no charge (therefore electrically neutral)

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11
Q

Electron

A

A subatomic particle with a negative charge

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12
Q

Quarks

A

The smallest known particles that make up protons neutrons

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13
Q

Nucleus

A

The positively charged center of that atom where most of the mass of the atom is located

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14
Q

Electron cloud

A

The negatively charged area around the nucleus where the volume of the atom is located

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15
Q

Valence Electron

A

An electron with the most energy located in the electron cloud

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16
Q

Isotopes have different

A

number of neutrons

17
Q

Isotopes have the same

A

atomic number

18
Q

The farther an electron is from the nucleus the more what it has?

A

energy

19
Q

The total number of electrons in the outer shell of a sodium is

A

1

20
Q

The total number of neutrons in the nucleus of any atom is equal to the

A

mass number minus the atomic number

21
Q

Two different isotopes of an element have different

A

number of neutrons

22
Q

Two different isotopes of an element have the same

A

number of protons

23
Q

An atom is neutral because

A

the number of protons and electrons are equal

24
Q

What is the correct symbol for an isotope of carbon with 6 protons and 6 neutrons?

A

12C

25
Q

Which of the following elements would be the best conductor of electricity

A

Silver

26
Q

Which of the following elements would be the most reactive

A

Iodine

27
Q

Which of the following elements would be the least reactive

A

Argon

28
Q

At room temperature, most metals are

A

Solids

29
Q

127I is a

A

halogen

30
Q

proton + neutrons=

A

mass number

31
Q

An isotope of carbon has 7 neutrons, the isotope is

A

13C and Carbon - 13

32
Q

This element has 6 energy levels and 8 valence electrons. It must be

A

Lead (Pb)

33
Q

This element is in the family with the most reactive nonmetals and has 4 energy levels. It must be

A

Fluorine (F)

34
Q

Electrons are found where?

A

Electron shells

Physical Science (9 decks)

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