Once in a while a quiz pops up and leads you to five questions. Answering questions correctly will give you a temporary bonus. Besides that, correct answers are also needed for achievements and some of the objectives to level up.

There are 15 different quiz types in the game, adding up to 75 questions. Each type will ask the same four questions in the same order and a fifth ones where you have to name a chosen compound.

The quiz does not have a time limit. Take your time to look for the answers - after all, the game tries to teach you some chemical knowledge :)

Each type seems to appear equally often.

Q: At what temperature does water boil?
A: 100 °C (212 °F)

Q: How many elements are found naturally on Earth?
A: 98

Q: The process of photosynthesis depends on which molecule?
A: Chlorophyll

Q: What is it called when a solid turns into a liquid?
A: Melting



Q: Elements can be broken down into simpler substances.
A: False

Q: Which of these is the smallest?
A: An electron

Q: Which is the most common sate of matter in the Universe?
A: Plasma

Q: What are proteins made of?
A: Amino acids



Q: When a substance goes from being solid to a liquid, it is a …
A: Physical change

Q: A matter requires energy to change from a solid state to a liquid state.
A: True

Q: Alkali metals are soft enough to cut with a knife.
A: True

Q: How many atoms are there in a single grain of sand?
A: 60 000 000 000 000 000 000 (second longest answer)



Q: What force pulls liquids towards the ground?
A: Gravity

Q: Avogadro’s constant, has the value
A: 6.022140857*10^23

Q: The process by which unstable atoms lose energy in a spontaneous way is called what?
A: Decay

Q: Which scientist used the cathode ray tube to isolate the electron in 1897?
A: J. J. Thomson



Q: Name a force that keeps molecules together
A: Attraction

Q: What does it mean when an element is radioactive?
A: All of the above

Q: Where can you easily find halogens in the natural world?
A: In salt compounds with metals

Q: Which of the following metals is most likely to be produced through electrolysis?
A: Aluminum



Q: How many neutrons in a Hydrogen atom?
A: 0

Q: Which is an example of a crystal lattice?
A: Diamond

Q: In a chemical reaction, bonds are broken and reformed between different atoms.
A: True

Q: If an atom has 13 electrons, how many shells / orbits will it have?
A: 3



Q: The columns of the periodic table are called groups.
A: True

Q: The simplest form of matter is ...
A: Elements

Q: You might find boron in the soap in your bathtub.
A: True

Q: Which subatomic particle has no charge?
A: Neutron



Q: How many rows does the periodic table have?
A: 7

Q: What will happen to the pressure inside of a sealed tube if you raise the temperature?
A: Go up (increase)

Q: Lithium is used in each of the following ways except …
A: All of the above

Q: Which subatomic particle has a positive charge?
A: Proton



Q: The rows of the periodic table are called periods.
A: True

Q: How many electrons does a hydrogen atom have?
A: 1

Q: Which of the following is not an example of a chemical change?
A: Melting

Q: Which subatomic particle is located outside of the nucleus?
A: Electron



Q: How many columns has the periodic table?
A: 18

Q: Which choice is the densest state of matter?
A: Solids

Q: For an object to be considered matter, it must consist of ...
A: Mass and volume

Q: The first list of 33 chemical elements was compiled in the late 1790s by which French scientist
A: Antoine Lavoisier



Q: If you leave water in a glass and some molecules turn into a gas, it is called …
A: Evaporation

Q: Which protein do diabetics lack?
A: Insulin

Q: Which of the following is not one of the kinds of radiation emitted during decay?
A: Omega

Q: Which of the following properties is not typical of metallic solids?
A: High vapor pressure



Q: Compounds are substances that are made up of
A: Two or more elements.

Q: If you pour liquid nitrogen into a glass at room temperature, it will change its physical state to a solid.
A: False

Q: What is the percentage of oxygen in carbon dioxide?
A: 72.7%

Q: Which protein carries oxygen throughout the blood?
A: Hemoglobin



Q: This mineral helps to build strong bones and teeth. What is it called?
A: Calcium

Q: Keeping your nervous system healthy is the work of what type of mineral?
A: Potassium.

Q: When your body needs to fight off infections, which mineral is important to have?
A: Zinc.

Q: This mineral helps to make our blood vessels, tendons, and nerves strong. What is it called?
A: Copper.



Q: Which of the following represents a physical change?
A: Cutting potatoes

Q: Atoms in a liquid are farther apart than the atoms in a gas.
A: False

Q: Which has the least energetic molecules?
A: Solids

Q: Acids are found on the pH scale between the numbers:
A: 0 – 7



Q: The freezing point will always be a lower temperature than the boiling point (with consistant pressure).
A: True

Q: Which scientist came up with the concept of a periodic table?
A: Dimitri Mendeleev

Q: Most of the liquids you find everyday have a pH near
A: 7

Q: What is the percentage of sulfur in sulfuric acid?
A: 32.7%