The Toughest 9th Grade Chemistry Multiple Choice Quiz
This is probably the toughest chemistry test a 9th grader may ever face. With over 68 questions, this quiz will test your knowledge of some of the fundamental topics of the subject. All the questions in this questionnaire are multiple-choice, meaning you have one correct answer to hit for among four options. Without worrying about the time limit, just follow the trail of questions and answer carefully. All the best!
- 1.Several models of what the atom may have looked like were made. The earliest model, representing the atom as a positively charged sphere in which negatively charged electrons were embedded, was developed by:
- A.
Bohr
- B.
Thomson
- C.
Nagaoka
- D.
Boyle
- 2.The Canadian contribution to the study of the atom came about by a scientist who named and studied the nucleus. Who was he?
- A.
Rutherford
- B.
Thomsen
- C.
Chadwick
- D.
Bohr
- 3.“It’s like shooting a gun shell at a place of tissue paper and it comes back right at you.” These famous words were said by:
- A.
Dalton
- B.
Thomsen
- C.
Rutherford
- D.
Chadwick
- 4.Erica was told by her science teacher that ‘amu’ is the basis of the element classification system. The symbol ‘amu’ stands for:
- A.
Atomic mass unit
- B.
Atomic measurement unit
- C.
Astronomical measurement unit
- D.
Astronomical mass unit
- 5.Jason noticed that the periodic table had colored sections. The seven elements between the metal and non-metal sections had their own color. They represent a group called:
- A.
Halogens
- B.
Metalloids
- C.
Intermediates
- D.
Mid-elements
- 6.Ashton noticed that Cu, Zn, and Ga are in the same horizontal row in the periodic table. She concluded that these three elements belong to the same:
- A.
Family
- B.
Period
- C.
Group
- D.
Section
- 7.What does the atomic number of an atom represent?
- A.
Protons and electrons
- B.
Protons and neutrons
- C.
Neutrons and electrons
- D.
Electrons and shells
- 8.A chemistry poster indicated information on the number of particles in a newly discovered atom. According to the information in the poster the atomic number is: Protons: 113 Electrons: 113 Neutrons: 281
- A.
113
- B.
226
- C.
394
- D.
507
- 9.As you move from the left side of the periodic table to the right side the elements become:
- A.
Less metallic
- B.
Liquid
- C.
More conductive
- D.
Solid in state
- 10.Water (H20) is a common compound made up of:
- A.
3 elements and a total of 3 atoms
- B.
2 elements and a total of 2 atoms
- C.
3 elements and a total of 2 atoms
- D.
2 elements and a total of 3 atoms
- 11.The numbers 3 and 8 in the chemical formula for propane, C3H8, are given a special name. They are called:
- A.
Subscripts
- B.
Equations
- C.
Coefficients
- D.
Atomic numbers
- 12.NaHCO3 indicates one molecule of baking soda and best represents the _____ for baking soda.
- A.
Chemical name
- B.
Chemical equation
- C.
Chemical formula
- D.
Chemical symbol
- 13.A simple volcano demonstration in a science fair project requires that vinegar be mixed with baking soda. The result is bubbling and fizzing. The carbon dioxide produced in this reaction is the most accurately written as:
- A.
CO2
- B.
CO2(g)
- C.
CO2(s)
- D.
CO2(l)
- 14.
- A.
3
- B.
6
- C.
21
- D.
42
- 15.Vitamin C identified by the chemical formula C6H8O6 (s) has:
- A.
6 carbon atoms, 8 helium atoms, and 6 oxygen atoms
- B.
6 calcium atoms, 8 hydrogen atoms, 6 oxygen atoms
- C.
6 calcium atoms, 8 hydrogen atoms, and 6 osmium atoms
- D.
6 carbon atoms, 8 hydrogen atoms, and 6 oxygen atoms
- 16.Angelo required an aqueous solution of sodium chloride. He made the solution by dissolving salt in:
- A.
Vinegar
- B.
Air
- C.
Oxygen gas
- D.
Water
- 17.Most atoms are neutral. To become a positive ion the atom must:
- A.
Gain electrons
- B.
Gain electrons and protons
- C.
Lose electrons
- D.
Lose electrons and protons
- 18.Molecular compounds can be found in all three states of matter at room temperature. Which molecule compound is a liquid at room temperature?
- A.
Rubbing alcohol
- B.
Sugar
- C.
Carbon dioxide
- D.
Methane
- 19.What is an atom?
- A.
Largest part of a element
- B.
Smallest part of a element
- C.
Larger than a substance
- D.
Part of the nucleus
- 20.What does an atom represent?
- A.
The pure substance
- B.
A compound
- C.
A element
- D.
A ion
- 21.What are the parts of an atom?
- A.
Nucleus, element, carbon, space
- B.
Ions, electrons, neutrons, water
- C.
Protons, neutrons, electrons, nucleus
- D.
Protons, neutrons, nucleus, mass
- 22.What is the key idea of the Bohr Model?
- A.
Explained that there was a nucleus
- B.
Explained that atoms are hard to see with the naked eye
- C.
That an atom was like a raisin bean bun
- D.
There are electrons inside the atom that orbit the nucleus
- 23.Since atoms are neutral, the number of electrons is equal to the number of:
- A.
Neutrons
- B.
Protons
- C.
Nucleus
- D.
Ions
- 24.How do you calculate the number of neutrons in an atom?
- A.
The atomic mass plus the number of protons
- B.
The atomic mass subtracted the number of protons
- C.
The atomic mass plus the number of electrons
- D.
The atomic mass subtracted the number of electrons
- 25.How many electrons max. are allowed in the 1st, 2nd and 3rd shell in a Bohr Diagram?
- A.
1st: 2 2nd: 4 3rd: 4
- B.
1st: 2 2nd: 5 3rd: 7
- C.
1st: 3 2nd: 9 3rd: 9
- D.
1st: 2 2nd: 8 3rd: 8
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