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Chemistry Trivia Trivia Quiz

Do you want to be a chemist?

A multiple-choice quiz by Computer100. Estimated time: 3 mins.

Author
Computer100

Time
3 mins

Type
Multiple Choice

Quiz #
368,649

Updated
Dec 03 21

# Qns
10

Difficulty
Average

Avg Score
6 / 10

Plays
297

Last 3 plays: Guest 223 (8/10), Melissa0208 (3/10), Guest 75 (10/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. If an isotope of boron has a mass number of eleven, how many neutrons does it have? Hint

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Question 2 of 10

2. Which scientist discovered the electron? Hint

Robert Millikan

Ernest Rutherford

J. J. Thomson

Bohr

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Question 3 of 10

3. What would happen if a chemist mixed pure sodium with water? Hint

The sodium would evaporate

No reaction occurs

Sodium chloride forms

The products would catch fire and explode

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Question 4 of 10

4. If a strip of red litmus paper is placed into a solution and the paper turns blue, what is true about the solution? Hint

It is basic

It is acidic

It is neutral

It is radioactive

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Question 5 of 10

5. Which of the following elements is the most electronegative? Hint

Fluorine

Boron

Hydrogen

Lithium

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Question 6 of 10

6. Based on periodic trends, when you move left to right across a family on the periodic table ionization energy decreases.

True

False

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Question 7 of 10

7. Based on the ideal gas law, and a constant temperature, what happens to the volume of a gaseous system when the pressure decreases? Hint

Increases

Remains the same

Decreases

Depends on the gas

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Question 8 of 10

8. To determine the amount of valence electrons an element has, look at the last digit of the element's what? Hint

Atomic number

Family

Group

Mass number

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Question 9 of 10

9. Which of the following ions is generally considered insoluble? Hint

Carbonate

Potassium

Sodium

Ammonium

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Question 10 of 10

10. A catalyst speeds up a chemical reaction by lowering the activation energy.

True

False

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Most Recent Scores

Apr 14 2024 : Guest 223: 8/10
Apr 06 2024 : Melissa0208: 3/10
Mar 19 2024 : Guest 75: 10/10

Score Distribution

Quiz Answer Key and Fun Facts

1. If an isotope of boron has a mass number of eleven, how many neutrons does it have?

Answer: 6

Boron has five protons. A neutral boron atom would also contain five neutrons, but isotopes are elements where the amount of neutrons differ from the amount of protons.

2. Which scientist discovered the electron?

Answer: J. J. Thomson

Thomson discovered electrons as a result of his cathode ray tube experiments. He did this by firing currents through glass pipes filled with gas and recorded the electrical charge.

3. What would happen if a chemist mixed pure sodium with water?

Answer: The products would catch fire and explode

When solid sodium is placed in water it skids across the top until a small explosion occurs. The products of the reaction are sodium hydroxide and hydrogen gas.

4. If a strip of red litmus paper is placed into a solution and the paper turns blue, what is true about the solution?

Answer: It is basic

Litmus paper is one way to test the pH of a solution. Blue litmus paper is used to test acidity and turns red if the solution is acidic.

5. Which of the following elements is the most electronegative?

Answer: Fluorine

Fluorine is the most electronegative element. If two atoms have a large difference in electronegativity they will form an ionic bond. A bond formed between two atoms with similar charges will be covalent.

6. Based on periodic trends, when you move left to right across a family on the periodic table ionization energy decreases.

Answer: False

Ionization energy, which is the amount of energy required to remove an electron from an atom, generally increases across a family. Periodic trends can be used to compare two elements based on other characteristics such as size and electronegativity.

7. Based on the ideal gas law, and a constant temperature, what happens to the volume of a gaseous system when the pressure decreases?

Answer: Increases

The Ideal Gas Law states that pressure times volume is equal to moles times 0.0821 times temperature(PV=nRT). If you know three of the four conditions of a gaseous system you can use this equation to find the fourth.

8. To determine the amount of valence electrons an element has, look at the last digit of the element's what?

Answer: Group

Valence electrons are the electrons in the outer sub-shell of an atom. The further away you get from the center of atom the more valence electrons the atom can hold. This is why larger atoms have more valence electrons then smaller atoms.

9. Which of the following ions is generally considered insoluble?

Answer: Carbonate

With a few exceptions, compounds that contain the carbonate ions will not dissolve in water and will form a precipitate (solid) in a chemical reaction. Sodium, potassium, and ammonium are all aqueous and will dissolve in solution.

10. A catalyst speeds up a chemical reaction by lowering the activation energy.

Answer: True

Activation energy is the minimum amount of energy required to start a chemical reaction. A catalyst lowers activation energy by providing an alternate pathway for the reaction.

Source: Author Computer100

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