Flashcards
Atomic Structure
Flashcards do conjunto (39)
- 1What is the charge and mass of a s of a proton?(+) Positive charge
Mass of 1 - 2What is the charge and mass of a neutron?No charge (neutral)
Mass of 1 - 3What is the charge and mass of an electron?(-) Negative charge
Mass of 0 - 4What does the Mass Number tell you?The number of protons and neutrons in an atom.
- 5What does the Atomic Number tell yu?The number of protons in an atom.
- 6What is the relationship between electrons and protons in a neutral atom?Number of electrons = Number of protons
- 7What is Atomic Mass of an atom?A relative number used to compare the mass of atoms.
Unit: 1/12 of the mass of an atom of carbon 12.
The atomic masses of all other atoms are a ratio to carbon 12 - 8What is an isotope?Isotopes are atoms with the same number of protons but a different number of neutrons.
Atomic number = number of protons
Atomic mass = sum of protons & neutrons.
Isotopes are elements with the same atomic number but different mass numbers. - 9Differentiate between the properties of IsotopesChemical properties are identical but physical properties will differ.
- 10What is the Mass spectrum calculations?RIM: Relative isotopic mass
RAM: Relative atomic mass - 11How to calculate the Relative atomic mass (RAM)?RAM= %Abs x RIM / 100
- 12What do waves have?A frequency
- 13How to find the Energy of electromagnetic radiation?E= h x f
E=energy
h= Planck's constant
f= frequency - 14how to calculate radiation?
- 15What is the symbol for frequency? What are the units for Frequency?V= "nu"= frequency
units= "cycles per sec" - 16When do electrons emit a packet energy in the form of light (photon or quantum)?When electrons are exited (heat or electricity) that can move to a higher energy level, when they move back down they emit energy.
- 17What does the colour emitted depend on?The colour of the light emitted depends on the Frequency.
- 18Is a Line Spectrum continuous or discrete?Not continuous, consists of discrete lines.
- 19What is ionisation?The minimum amount of energy to remove an electron from its shell.
- 20What is emissions spectra?Is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
- 21Information on the emission spectra:Background= black
Amount of lines depends on the number of transitions. - 22What can the emission spectra tell?What element is present, but not how much.
- 23What is Absorption Spectrum?A spectrum of electromagnetic radiation transmitted through a substance, showing dark lines or bands due to absorption at specific wavelengths.
Its a continous specrum. - 24Absorption and Emission spectrum in elements:every element has its own unique absorption and emission spectrum, but are the same for each element.
Overlapping = identical - 25What background does absorption have?A coloured background
- 26Why can only certain transitions occur?Because electrons can only exist in certain energy levels
- 27How is the line spectrum produced?Each transition emits light of a particular frequency
- 28What happened to the lines at a higher frequency?the lines get closer together (converge)
- 29What does a continuous spectrum suggest?That electrons can exist anywhere around the nucleus.
- 30What does a line spectra show?Where the electron is.
- 31What happens to the energy difference between levels when the level number increases?The energy difference between levels gets smaller as the level number increases.
- 32Cold or hot gas for Emission?Hot gas
- 33Cold or hot gas for Absorption?Cold gas
- 34What does the lower energy part of the spectrum represent?The lower energy transitions (higher numbered levels), which are very close together.
- 35When does a series of line transitions come to an endWhen it reaches infinity
- 36What is a orbital?Each of the actual or potential patterns of electron density which may be formed in an atom or molecule by one or more electrons, and can be represented as a wave function.
- 37What are the shapes of orbitals?S- spherical
P- dumbell shape around the nucleus
D- 4 leaf clover - 38How many electrons in a orbital0, 1, 2 per orbital
- 39—
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- Year 12 Biology FlashCards sobre Atomic Structure , criado por Ines Thorpe em 03-05-2017.
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- Ines Thorpe
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