Physics Flashcards
What is Specific heat capacity?
The amount of energy needed to change 1kg of a substance by 1 degrees celcius
What is Alpha radiation?
Helium nucleus with 2 protons and 2 neutrons
What is Beta radiation?
Fast moving electron
What is Gamma radiation?
High energy electromagnetic wave
What particle has a negative charge?
Electron
What particle has a positive charge?
Proton
How does an electron move to a higher energy level?
Emitting electromagnetic radiation
How does an electron move to a lower energy level?
Absorbing electromagnetic radiation
Who discovered the plum pudding model?
JJ Thomson
Who discovered the nucleus?
Rutherford
The first person to come up with the idea of the atom?
Democritus
Who discovered electron shells?
Bohr
Who discovered neutrons?
Chadwick
An atom that gains or loses an electron?
Ion
Why does a neutral atom has no overall charge?
Because protons and electrons have an equal opposite charge.
What is an Isotope?
Atoms of the same element with different numbers of neutrons
What is radioactive decay?
the emission of energy in the form of ionizing radiation
What are the particles in the nucleus of an atom?
Protons and Neutrons
What is Half Life?
The time it takes for half of the unstable nuclei to decay
Where is the majority of an atoms mass?
In the Nucleus
What is the size of the radius of the atom?
1 x 10^-10 metres
What are good conductors of heat?
Metals
What are poor conductors of heat?
Non-metals and gases
Name some types of energy?
Kinetic energy, heat energy, light energy
What are the main uses of energy?
Transport, Generating electricity, Heating
Renewable energy source?
Wind Power, Solar Power, Hyrdoelectric Power
Non-renewable energy source?
Coal, Gas, Oil
