chem lessons 1-5
the mass of the air they displace is less than their mass.
A person cannot fly because: the volume of the air they displace is less than their volume. OR the mass of the air they displace is less than their mass.
not very dense
According to the particle theory of matter: gases are not very dense OR very dense?
fastest
According to the particle theory of matter: gases more fastest OR slowest?
The particles in solids are moving faster than the particles in liquids.
All of the following statements are part of the particle theory of matter except one: There are forces of attraction between the particles OR The particles in solids are moving faster than the particles in liquids. OR Particles are always moving.
Pure substances
Elements and compounds are examples of __________________
chemical change
Examples of which one, chemical or physical change: digestion, burning, cooking
in a chemical change
In a physical change OR chemical change a new substance is formed?
in a physical change
In a physical change OR chemical change the substance remains the same?
Corrosion
Metal rusting is an example of this chemical change.
Malleability
Name a property of matter that means "bendable".
compounds
Pure substances that are made up of more than one element (like glucose) are called ___?
particles
The Particle Theory of Matter: all matter is composed of ____________
physical property
Which one, a Physical or chemical property, can be observed without permanently changing the substance.
Bohr
_____ I concluded that electrons orbit around the nucleus like the planet orbitting around the sun.
Rutherford
_____ I found that negatively charged electrons revolved around a dense, positive nucleus.
Dalton
_____ My theory was that the atom is a small, hard, indestructible sphere that cannot be subdivided.
Thompson
_____I came up with the "Plum Pudding" or "Raisin Bun" model whereby electrons and protons are evenly spaced throughout the atom.
compound
what is made of matter and is a pure substance.
