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the periodic table of elements Flashcards

Chapter 6 in text book (16 cards)

1
Q

periodic table of elements

A

chart of all known earths known elements

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2
Q

Columns

A

groups/families

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3
Q

rows

A

Periods

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4
Q

Periodic Law

A

Physical and chemical properties of the elements are periodic functions of their atomic #’s

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5
Q

compound

A

joining of 2+ elements

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6
Q

Electron

A

negatively charged particles

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7
Q

Proton

A

positively charged particles

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8
Q

energy levels capacity

A

2, 8, 18, 32

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9
Q

amu

A

atomic mass unit

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10
Q

what nucleus is made of

A

protons and neutrons

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11
Q

neutrons

A

particle with no electric charge

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12
Q

atomic number

A

of protons and electrons

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13
Q

opposites attract

A

electro magnetic

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14
Q

democritus

A

2000+ years ago, atom is the smallest piece of matter, always moving

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15
Q

Dalton

A

elements are composed of atoms, early 1800’s, compounds

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16
Q

JJ Thomson