atomic structure Flashcards

1
Q

Anion

A

A negatively charged ion

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2
Q

Atomic Number

A

The number of protons in the nucleus of an atom

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3
Q

Cation

A

A positively charged ion

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4
Q

Continuous Spectrum

A

A continuous spectrum is made up of the full spectrum of light, like a rainbow, with each color merging into the next.

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5
Q

Continuum

A

A series of line becomes so close together that they merge

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6
Q

Convergence

A

The decreasing of the distance between lines in an emission spectrum as the energy of a set of spectral lines increases

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7
Q

Electromagnetic Spectrum

A

The range of all possible electromagnetic radiation

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8
Q

Electron Shell

A

The region of space surrounding the nucleus in which electrons may be found

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9
Q

Electron Arrangement

A

The pattern of electrons around a nucleus, written as a series of numbers each of which represents the number of electrons in an electron shell, starting from the shell closest to the nucleus, and proceeding outwards

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10
Q

Emission Spectrum

A

A line spectrum generated when an element is excited and the releases energy as lighht

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11
Q

Frequency

A

The number of waves passing a given point each second

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12
Q

Ground State

A

The lowest energy state of an atom n=1

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13
Q

Ions

A

Atoms that have lost or gained an electron

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14
Q

Isotopes

A

Atoms that have the same atomic number but different mass numbers

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15
Q

Line Spectrum

A

Discrete lines that represent light of discrete energies on a black background

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16
Q

Mass Number

A

The sum of the number of protons and neutrons in the nucleus of an atom

17
Q

Mass spectrometer

A

An instrument that enables the relative masses of atoms to be determined

18
Q

Neutron

A

An uncharged subatomic particle found in the nucleus of an atom

19
Q

Nucleus

A

The small dense central part of the atom

20
Q

Proton

A

A positively charged subatomic particle found in the nucleus of the atom

21
Q

Radioisotope

A

An isotope that is radioactive

22
Q

Relative Atomic Mass (Ar)

A

The weighted (averaged) mass of all isotopes of an element; relative to (one atom of) 12C

23
Q

Relative Isotopic Mass (Ir)

A

The mass of the atom on the scale on which the mass of an atom of the carbon-12 isotope (12C) is the 12 units exactly.

24
Q

Valence electrons

A

Electrons in the outer shell (the highest main energy level) of an atom

25
Q

Wavelength

A

The distance between successive crests of a light wave