Subatomic Particles Flashcards
(17 cards)
What is the smallest of the three subatomic particles?
Electrons
What kind of source does a cathode ray need?
An electrical source
What charge is a cathode and what charge is an anode?
A cathode is negative and an anode is positive
What’s electric charge is equal to but opposite of that of an electron
A proton
Who created the plum pudding model of the atom?
J. J. Thompson
Who disproved the plum pudding model?
Hans Geiger and Ernest Marsden
What are the building blocks of an atom’s nucleus that make up protons and neutrons?
Quarks
What determines the number of protons in a nucleus?
The atomic number/Z
What is the sum of the number of protons and neutrons in an atom?
Mass number/A
What are nucleons
Protons and neutron particles
Atoms of the same element that differ in their number of neutrons are called what?
Isotopes
Where, in an elements name, does the mass number go?
Upstairs
Where does the atomic number (protons and neutrons) go?
Downstairs
What has a different number of electrons than neutrons?
Ions
What type of molecule has more electrons than protons, making it negatively charged?
An anion
What is a positively charged ion?
Cation
In what type of atom are there equal numbers of protons and neutrons
Neutral atoms
