2.1 atomic structure Flashcards

1
Q

define isotope

A

atoms of the same element with different number of neutrons but the same number of protons and different masses

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2
Q

define cation

A

positive charged ion (fewer electrons than protons)

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3
Q

define anion

A

negative charged ion (more electrons than protons)

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4
Q

define mass number and its others names and notations

A

(A) nucleon number: sum of protons and neutrons

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5
Q

define atomic number and its other notations

A

(z) proton number: number of protons in the nucleus of an atom

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6
Q

relative isotopic mass

A

the mass of an isotope compared with 1/12th mass of an atom of carbon-12

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7
Q

define

relative atomic mass

A

Ar The weighted mean mass of an atom of an element relative to 1/12th the mass of an
atom of carbon-12

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8
Q

Relative formula mass

A

The weighted mean mass of the formula unit of a compound compared with 1/12th mass of an atom of carbon 12

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9
Q

Relative molecular mass

A

(Mr) The weighted mean mass of a molecule of a compound compared with 1/12th of the mass of carbon-12

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10
Q

Proton: abbreviation,relative charge,relative mass

A

Abbreviation: p+
relative charge: 1+
relative mass: 1

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11
Q

Neutron: abbreviation,relative charge,relative mass

A

Abbreviation: n
relative charge: 0
relative mass: 1

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12
Q

electron abbreviation,relative charge,relative mass

A

Abbreviation: e-
relative charge: 1-
relative mass: 1/1836

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13
Q

How do you work out the number of neutrons?

A

A-Z

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