Atoms
Nucleus
Where are the protons and neutrons found?
Lose 2 electrons
How do metal atoms in group 2 form 2+ions?
Ball of positive charge with negative electons within it
What is the plum pudding model?
Fast moving electron from the nucleus
What is Beta radiation?
Energy levels
Where are the electrons located?
gain 3 electrons
How do non-metal atoms of group 5 form 3-ions?
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An electromagnetic wave from the nucleus
What is Gamma radiation?
Mass number
What the total number of protons and neutrons in an atom
Positive ions
What do metal atoms form when they lose electrons?
Bohr
Who suggested electons orbit the nucleus in shells?
A decreas in mass of 4 and charge of 2
What does alpha decay cause?
Isotopes
What has the same number of protons but a different number of neutrons?
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20Yrs later (after first idea of nucleus)
When did chadwick discover neutrons?
thin aluminium
What is the minimum material that absorbs / stops Beta radiation?
Same number of electrons and protons
Why are atoms overall neutral charge?
Jump to a higher energy level
What happens if an atom absorbs EM radiation?
Atoms are mostly empty space
What did the alpha particle scattering experiment show?
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