Nurse Cheung Chemistry Flashcards
Direct change from solid to gas is called
Dry ice is an example
Sublimation
Direct change from gas to a solid is called
Fire extinguisher
Deposistion
Property of Matter
- Does not depend on the size or amount of matter in the object
Intensive or Extensive
- Does depend on the amount of matter in the object
Exp.
Is mass Intensive or Extensive?
Is boiling point Intensive or Extensive?
- Intensive
- Extensive
Mass is Extensive
Boiling Point is Intensive
What kind of bond is water
Polar covalent
This property of water allows it to travel through tiny capillaries and create surface tension
Cohesiveness
This property of water allows it to stick to other molecules and dissolve them
Adhesiveness
A ____ bond occurs when atoms share electrons
Covalent
Covalent bonds are common between elements of the same type.
True or False
True
What is a polar covalent bond
2 atoms sharing electrons unequally. Hence, one has a slightly negative and one a slightly positive charge.
This type of bond happens when 1 atom gives up and the other recieves an electron.
Ion
Ionic bonds happen most between these types of elements.
With this type of element usually giving up the electron.
Metals & non metals
Metal gives up electron to non metal
Cations give or receive electrons
Anions give or receive electrons
What are their charges
Cations give electrons
Anions receive electrons
Cation Positive
Anions Receive
Define solute, solvent, solution and give an example.
Solute disolved in the solvent to make a solution.
Salt (solute) water (solvent) salt water (solution)
2Na + Cl2 → 2NaCl
Is this type of reaction
Synthesis
2 seperate things joining together to form 1 compound is this type of reaction.
Synthesis