Particle model Flashcards
What is the structure of a atom?
A atom has a small positively charged nucleus, made up of protons and neutrons. It is then surrounded by negativity charged electrons
What are the three part of atom?
Protons,neutrons, electrons
What is the overall change of a atom?
Neutral
What are the properties of a proton?
They have a change of +1
They are found in the nucleus
What is the change of a electron?
-1
What is the change of neutrons?
0 - they are neutral
What did the Rutherford experiment show?
Most alpha particals passed straight through the foil
How ever some particals bounced back to wards the source
What was the lay out of the plum pudding model?
A ball of positively changed ball with negativity charged electrons
What did Rutherford discover?
Alpha particles could bounce back off atoms. So that a atoms mass is concentrated in the center (nucleus)
What did Bohr discover?
That the electrons orbit the nucleus at a fixed distance. And that some particles have no charge at all
What is the equation for density?
Density = mass / volume
What happened to a item if it has a lower density than water?
It flottes
What is the law of displacement?
The law of displacement says that an object completely submerged in a fluid will replace an amount of fluid equal to its own weight
What is the correct unit for density?
Kg/m^3
What are the three states of matter?
Solid liquid and gas
