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PHYSCI > Lesson 1: Atomic Number and Atomic Mass > Flashcards

Lesson 1: Atomic Number and Atomic Mass Flashcards

1
Q

The basic unit that makes up all matter

A

Atom

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2
Q

True or False: Atoms have their own name, atomic mass, and atomic size.

A

True

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3
Q

What do we call these different atoms?

A

Chemical Elements

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4
Q

Where are chemical elements organized?

A

In the periodic table

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5
Q

True or False: Matter is made up of destructible atoms.

A

False, indestructible.

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6
Q

True or False: Atoms forming molecules combine in large whole-numbered ratios.

A

False, small whole-numbered ratios.

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7
Q

True or False: Atoms creating molecules combine in small half-numbered ratios.

A

False, small whole-numbered ratios.

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8
Q

True or False: Atoms of a given element have identical properties.

A

True

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9
Q

True or False: Atoms forming molecules combine in small whole-numbered ratios.

A

True

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10
Q

True or False: A molecule is the smallest particle of an element.

A

False, atom

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11
Q

True or False: Atoms cannot be created only.

A

False, also destroyed

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12
Q

True or False: Atoms cannot be destroyed only.

A

False, also created

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13
Q

True or False: Atoms cannot be created nor destroyed.

A

True

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14
Q

True or False: Atoms change in chemical reactions.

A

False, remain unchanged

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15
Q

True or False: Atoms remain unchanged in chemical reactions.

A

True

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16
Q

Dalton’s Atomic Theory

A
  1. Matter is made up of indestructible atoms.
  2. The smallest particle of an element is the atom.
  3. Atoms of a given element have identical properties.
  4. Atoms cannot be created nor destroyed. They remain unchanged in a chemical reaction.
  5. Atoms forming molecules combine in small whole-numbered ratios.
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17
Q

Refers to the columns on the periodic table

A

Group

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18
Q

Refers to the rows on the periodic table

A

Period

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19
Q

True or False: Elements in a group have the same number of electron shells.

A

False, valence electrons

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20
Q

True or False: Elements in a period have the same number of electron shells.

A

True

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21
Q

True or False: Elements in a group have the same number of valence electrons.

A

True

22
Q

True or False: Elements in a row have the same number of valence electrons.

A

False, electron shells

23
Q

How many periods in the periodic table?

A

7

24
Q

How many groups in the periodic table?

A

18

25
Q

True or False: An electron has no charge.

A

False, charge of -1

26
Q

True or False: The charge of a proton is -1.

A

False, +1

27
Q

True or False: The charge of an electron is -1.

A

True

28
Q

True or False: The charge of a proton is +1.

A

True

29
Q

True or False: The charge of a neutron is also -1.

A

False, 0

30
Q

True or False: The charge of a proton is 0.

A

False, +1

31
Q

What is the mass of a proton?

A

1.0073 amu

32
Q

What is the mass of a neutron?

A

1.0087 amu

33
Q

What is the mass of an electron?

A

0.00055 amu

34
Q

Who discovered the electron?

A

John Joseph ( J.J.) Thomson

35
Q

Who discovered the neutron?

A

James Chadwick

36
Q

Who discovered the proton?

A

Ernest Rutherford

37
Q

True or False: It was Ernest Rutherford who discovered the electron.

A

False, J.J. Thomson

38
Q

True or False: James Chadwick discovered the proton.

A

False, Ernest Rutherford

39
Q

True or False: J.J. Thomson discovered the neutron.

A

False, James Chadwick

40
Q

When was the proton discovered?

A

1900s

41
Q

When was the electron discovered?

A

1897

42
Q

When was the neutron discovered?

A

1932

43
Q

True or False: Neutrons were the first to be discovered.

A

False, electrons

44
Q

What do we call protons, neutrons, and electrons?

A

Sub-atomic particles

45
Q

How do we get the number of neutrons?

A

By subtracting the mass number and atomic number

46
Q

How do we get the mass number?

A

Add the number of protons and neutrons

47
Q

True or False: Number of protons = Number of neutrons

A

False

48
Q

True or False: Number of protons = Number of electrons

A

True

49
Q

True or False: The atomic number is an element’s identifier.

A

True

50
Q

The total number of neutrons and protons present in the atom’s nucleus

A

Atomic Mass

51
Q

How many known elements does the modern periodic table have?

A

118

52
Q

What is located at the center of an atom?

A

The nucleus

PHYSCI (6 decks)

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