Science Review Q3 8 Flashcards
What is the most common form of matter in the universe?
Plasma.
What phenomenon is caused by low-density plasma in the atmosphere?
Aurora.
What does BEC stand for?
Bose-Einstein Condensate.
What happens to matter in BEC?
It stops behaving as independent particles and collapses into a single quantum state.
What are physical properties?
Properties that can be observed without changing the composition of a substance.
Define intensive properties.
Properties that do not depend on the amount of the sample.
What are extensive properties?
Properties that depend on the amount of a sample.
What is a physical change?
A change that does not alter the composition of a substance.
Give an example of a physical change.
Conversion of ice to water.
What defines a chemical change?
Involves changes in the composition of a substance.
List 3 examples of chemical changes.
- Cook
- Bake
- Decompose
- Corrode
- Decay
- Rust
What is the positive charge in a battery?
Proton
What is the negative charge in a battery?
Neutron, Electrons
What experiment did Rutherford conduct?
He directed a beam of Alpha Particles to a thin sheet of gold
What conclusion did Rutherford reach about the atom?
The mass of an atom is mostly empty
Where is the nucleus located in an atom?
In the center of an atom
What do electrons do in relation to the nucleus?
Electrons revolve around the nucleus in circular orbits
List the three subatomic particles.
- Protons
- Neutrons
- Electrons
What is the sequence of energy levels from the nucleus?
K < L < M < N < O < P < Q
What does a shell represent in atomic structure?
Lines
What surrounds the nucleus in an atom?
Positively charged Protons and Electrons and Neutrons
What is the maximum number of electrons the lowest energy shell can accommodate?
2 Electrons
