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- 1. Multiple Choice
Which of the following results in a substance not transforming into a completely new substance?
Physical change
Physical property
Chemical change
Chemical property
- 2. Multiple Choice
Which of the following is an example of a chemical property?
The basketball is orange.
The gasoline is flammable.
The bike is made of metal.
The slice of cheese is a solid.
- 3. Multiple Choice
What is the main difference between a physical change and a chemical change?
Physical changes alter the composition whereas chemical changes alter the appearance of a substance
Physical changes describe the appearance of a substance whereas chemical changes describe qualities only observed with a reaction.
Physical changes describe qualities only observed with a reaction whereas chemical changes describe the appearance of a substance.
Physical changes alter the appearance whereas chemical changes alter the composition of a substance.
- 4. Multiple Choice
Which of the following statements about elements and compounds is accurate?
Elements are many different types of atoms together but compounds are just one type of atom.
Elements are pure substances that cannot be broken down physically but compounds are pure substances that can be broken down physically.
Elements are not found on the Periodic Table but compounds are found on the Periodic Table.
Elements are pure substances that cannot be broken down chemically but compounds are pure substances that can be broken down chemically.
- 5. Multiple Choice
Which of the following could be the chemical formula for a compound?
Na
CO2
H2 + O2
Au
- 6. Multiple Choice
Which of the following could be the chemical formula for an element?
Si2
H2O
C + O2
C6H12O6
- 7. Multiple Choice
Which of the following statements is true regarding the atomic number of an element?
The atomic number is the number of protons in an element
The atomic number is the number of electrons in an element.
The atomic number is the number of neutrons in an element.
The atomic number is the mass of the nucleus of an element.
- 8. Multiple Choice
The horizontal rows on the Periodic Table are referred to as which of the following?
Groups or Families
Periods or Rows
Columns or Rows
Valence or Orbitals
- 9. Multiple Choice
The vertical columns on the Periodic Table are referred to as which of the following?
Groups or Families
Periods or Rows
Columns or Rows
Valence or Orbitals
- 10. Multiple Choice
What does the Periodic Table help scientists do?
Identify the most common compounds found on Earth.
Create mixtures of elements in order to make new elements.
Make predictions about what kind of properties new elements might have.
Determine how expensive each element is to mine from the Earth.
- 11. Multiple Choice
Silicon (Si) is in period 3 on the Periodic Table. What does this tell you about this element?
It is highly reactive with water.
It has 3 valence electrons.
It has 3 protons in its nucleus.
It has 3 energy levels/shells in its electron cloud.
- 12. Multiple Choice
Calcium (Ca) is in group 2 on the Periodic Table. What does this tell you about this element?
It is not reactive with water.
It has 2 valence electrons.
It has 2 protons in its nucleus.
It has 2 energy levels/shells in its electron cloud.
- 13. Multiple Choice
Which of the following elements would have similar chemical properties to the element Oxygen (O)?
Nitrogen (N)
Chlorine (Cl)
Neon (Ne)
Sulfur (S)
- 14. Multiple Choice
Which of the following elements would have the same number of energy levels/shells as the element Sodium (Na)?
Magnesium (Mg)
Lithium (Li)
Potassium (K)
Oxygen (O)
- 15. Multiple Choice
The atomic number of an element is determined by which of the following?
Number of electrons
Number of neutrons
Number of protons
Number of protons and neutrons
- 16. Multiple Choice
The nucleus of an atom contains which of the following subatomic particles?
Electrons
Protons
Neutrons
- 17. Multiple Choice
An object will sink when placed into a liquid if it is
The same temperature
Heated to a warmer temperature
Less dense than the liquid
More dense than the liquid
- 18. Multiple Choice
. Which of the following is the reason oil is able to float on water?
Oil is less dense than water
Oil has less mass than water
Water is less dense than oil
Water has a greater volume than oil
- 19. Multiple Choice
Which of the following is true about 2 objects with the same mass, but different volumes?
Larger volume = more dense
Larger volume = less dense
Larger volume = same density
Smaller volume = less dense
- 20. Multiple Choice
A student noticed a yellow, solid substance was formed when mixing two clear liquids during a lab. What term describes this yellow, solid substance?
Physical change
Physical property
Endothermic and exothermic reaction
Precipitate
- 21. Multiple Choice
What is the number of molecules in 7H2O2 ?
4
7
2
1
- 22. Multiple Choice
How many atom of Carbon are in C9H8O4
1
8
12
9
- 23. Multiple Choice
How many elements are in 6NaOH ?
4
6
3
1
- 24. Multiple Choice
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
H3PO4
H2SO4
H2O2
H2O
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