Goal 4 Chemsitry Review #2
Reviews key concepts from Chemistry Goal
- 1.Which of the following is the heaviest?
- A.
The electron
- B.
The proton
- C.
The nuetron
- D.
The nucleus
- 2.Neutral lithium has 3 protons. During a chemical reaction, 1 electron is removed. How many protons does lithium have now?
- A.
3
- B.
2
- C.
1
- D.
You must know what element lithium reacted with to determine this.
- 3.Which of the following is a positive ion?
- A.
Barium (Ba) with 56 electrons and 58 protons
- B.
Sodium (Na) wil 11 protons and 11 electrons
- C.
Oxygen (O) with 8 protons and 10 electrons
- D.
Chlorine (Cl) with 17 protons and 18 electrons
- 4.Electron clouds (orbitals) contain
- A.
Thousands of fast-moving electrons
- B.
A few fast-moving protons
- C.
A few-fast moving electrons
- D.
Many nuclei
- 5.The nucleus of an atom has an overall ____________ charge.
- A.
Positive
- B.
Negative
- C.
Neutral
- D.
Empty
- 6.Which phase has the greatest density?
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
The temp must be known to answer this question
- 7.Tina uses a vice to squeeze each container. Which turns out to be the most compressible?
- A.
The solid phase container
- B.
The liquid phase container
- C.
The gas phase container
- D.
The temp must be known to answer this question
- 8.How does perspiration cool your skin?
- A.
It carries heat off when it condenses on your skin
- B.
It carries heat off when it evaporates from your skin
- C.
It carries heat off when it sublimes from your skin
- D.
It carries heat off when it deposits on your skin
- 9.Marquis is studying an unknown substance. He has recorded several properties in his notebook. Which of these properties is a physical property?
- A.
Boiling point
- B.
Flammability
- C.
Tendency to tarnish
- D.
Tendency to rust
- 10.The chemical combination of Atom A and Atom B would result in
- A.
An atom AB
- B.
An element AB
- C.
A molecule AB
- D.
A nucleus AB
- 11.The components of a homogeneous mixture could be described as
- A.
Inseperable
- B.
Evenly mixed
- C.
Chemically bound
- D.
Unevenly mixed
- 12.There are three mixtures listed below. Which one, if any, could not be seperated by evaporation?
- A.
Salt and water
- B.
Sawdust and water
- C.
Iron fillings and water
- D.
All of these mixtures could be separated by evaporation
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