Chapter 3:Arrangement of Electron in the Atom Flashcards

1
Q

energy level

A

is defined as the fixed energy value that an electron in an atom may have.

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2
Q

ground state

A

of an atom is one in which the electrons occupy the lowest available energy level

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3
Q

excited state

A

of an atom is one in which the electrons occupy higher energy levels than those available in the ground state

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4
Q

Orbitals

A

is a region in space within which there is a high probability of finding an electron

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5
Q

Sublevel

A

is a subdivision of a main energy and consists of one or more orbitials of the same energy

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6
Q

Continuous Spectrum

A

The array of colours (from broken up light) from white light passed through a glass prism.

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7
Q

Line Spectrum

A

A series of narrow coloured lines shown by an electric current passed through a hydrogen discharge tube.

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8
Q

IR Range

A

n=3,4 or 5

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9
Q

Atomic Absorption Spectrometry

A

When white light passes through a gaseous sample of an element.It is found that the light that emerges
has wavelight missing

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10
Q

What are emission line spectrum used for?

A

Detecting the presence of elements (Different elements have different colours)

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11
Q

Limitations of Bohr’s Theory

A
  1. Failed to account for many of the lines in the emission spectra of atoms.
  2. Electron had a wave motion.
  3. High probability of finding an electron in a region in space.
  4. It didnt take into account the presence of sublevels
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12
Q

P-Orbitals

A

Dumbell-Shaped

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13
Q

S-Orbitals

A

Spherical

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14
Q

Uses of Atomic Absorption Spectrometry

A
  1. Detecting the presence of certain elements in materials dissolve in water.
  2. For measuring the concentrations of these elements.
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15
Q

What was the idea of quantisation Bohr introduced?

A

Electron can only have a quantum(fixed amount )

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16
Q

What was Bohr’s Theory?

A

An electron in hydrogen occupies fixed energy levels. The electron is in its ground state
and when supplied with energy moves up an energy level and is now in an excited
state. It is unstable and falls back to its ground state producing a photon of light.
E 2 - E 1 = hf

17
Q

What was Bohr’s idea of an orbit?

A

Electrons revolve around the nucleus in fixed paths (orbits = energy levels,n) which have a fixed amount of energy .