Basic Ideas About Atoms Flashcards
(26 cards)
Atomic number
Number of protons (number of protons is same as number of electrons)
Mass of atom
Number of protons + number of neutrons
Isotopes
Different number of neutrons
Charge of an alpha particle
+2
Alpha decay effect on atomic number and mass number
Atomic number -2
Mass number -4
What are beta particles?
High energy electrons emitted by nucleus
What are alpha particles?
Helium nucleus
Beta particle charge
-1
Affect on proton number (atomic number) of atom undergoing beta decay
+1
Beta decay affect on neutrons
-1
How would beta decay affect mass?
No effect
Beta particle has a mass of 0
Electrons have a negligible mass
Positron emission result of
1 proton changing into a neutron emits a positron
Positron emission affect on number of protons (atomic number)
-1
Positron emission affect on number of neutrons
+1
Positron emission affect on mass
No change
Half life definition
Time taken for half a radioactive sample to decay
Frequency is ____ to wavelength
Inversely proportional
Frequency is ___ to energy
Directly proportional
Equation linking energy to frequency
E=hf
Equation linking frequency to wavelength
F=v/wavelength
Significance of convergence limit (last line on right of bar) of layman series
Gives first ionisation energy
Lyman series for what light?
UV
Balmer series for what light?
Visible
