List of chemistry questions with which you can learn about topics as diverse as atoms, states of matter, chemical elements, atomic models, famous chemists, laboratory instruments, chemical reactions and much more.
Answering questions is one of the best ways to learn, since it can be done as a game and this makes it interesting and fun. In addition, it can be learned in a group, doing challenges with family or friends. You may also be interested in these science questions.
What is the chemical element with the lowest atomic weight?
Answer
Hydrogen.
Does the nucleus of an atom have electrons and neutrons or protons and neutrons?
Answer
Protons and neutrons.
Ice is denser or less dense than liquid water?
Answer
It is less dense, so it floats.
What chemical compound does this figure represent??
Answer
Hydrochloric acid.
What are the three main states of matter?
Answer
Solid, liquid and gaseous..
What is this laboratory instrument called?
Answer
Bunsen lighter.
What is the temperature at which a substance changes from a liquid to a gas called?
Answer
Boiling point.
Is burning wood a physical or chemical change?
Answer
It's a chemical change.
What chemical element is commonly found inside this instrument?
Answer
Mercury.
What is the chemical symbol for Silver?
Answer
Ag.
What is the classification system of chemical elements according to their atomic number?
Answer
The periodic table.
What are the atoms that have a positive charge called?
Answer
Cations.
In a chemical reaction, bonds are broken and reformed between different atoms. True or false?.
Answer
True.
Sand and water is an example of what kind of homogeneous or heterogeneous mixture?
Answer
Heterogeneous.
What is the outermost shell of an atom called?
Answer
Valencia cloak.
Who is this english chemist?
Answer
John dalton.
What is the temperature at which a substance changes from a liquid to a solid called?
Answer
Freezing point.
What is the metallurgical process called in which a metal is obtained in the molten state?
Answer
Foundry.
What subatomic particles have a mass of about 1?
Answer
Protons and neutrons.
Are there more chemical elements or more chemical compounds?
Answer
There are many more chemical compounds.
What type of chemical reaction absorbs energy and requires energy for the reaction to occur?
Answer
Endothermic.
What chemical elements make up water?
Answer
Oxygen and hydrogen.
What branch of chemistry studies the chemical processes that take place in living things?
Answer
Biochemistry.
What are substances composed of atoms of the same element called?
Answer
Pure substances.
What is called the aggregation of two or more atoms?
Answer
Molecule.
What instrument used in chemical laboratories is shown in the picture?
Answer
Volumetric flask..
In what state does matter completely fill the space in which it is enclosed?
Answer
In the gaseous state.
What is the change of state from gas to liquid called?
Answer
Condensation.
What chemicals identified polonium and radium?
Answer
Pierre and Marie Curie.
What are the atoms of the same element with different numbers of neutrons in their nuclei called?
Answer
Isotopes.
What branch of chemistry deals with the study of carbon compounds?
Answer
Organic chemistry.
What are organic compounds that contain only hydrogen and oxygen called?
Answer
Hydrocarbons.
Who proposed the atomic model shown in the image?
Answer
It is Bohr's atomic model..
What is the chemical symbol for Potassium?
Answer
Its chemical symbol is K.
To whom is the establishment of the first periodic table of the elements owed??
Answer
To Dimitri Mendeleev.
Who discovered radioactivity?
Answer
Henri Becquerel.
What chemical elements are very good conductors of electricity?
Answer
The metals.
Who is this chemist?
Answer
Louis Victor de Broglie.
What is the name of the component of a solution that is found in greater proportion??
Answer
Solvent.
What is the number of atoms that a gram of matter contains??
Answer
Mol.
In what state of matter is surface tension observed??
Answer
In the liquid state.
What type of reaction releases energy and does not require initial energy to occur?
Answer
Exothermic.
What state of matter does not have its own shape or volume?
Answer
The gaseous state.
What is the chemical symbol for Plutonium?
Answer
Pu.
What is the force that holds two atoms together?
Answer
Chemical bond.
Which instrument is shown in the picture?
Answer
A Geiger Counter, which makes it possible to measure the radiation emitted by atomic nuclei.
Who claimed, in 1803, that matter is made up of small independent corpuscles that are impossible to divide?
Answer
John dalton.
On what principle is the hydrogen bomb based?
Answer
In nuclear fission or in nuclear fusion? In nuclear fusion.
What is the number of protons that an atom of an element has??
Answer
Atomic number.
What charge do the electrons in atoms have??
Answer
Negative charge.
Who is this Nobel Prize winning chemistry in chemistry?
Answer
Marie Curie.
What are the three types of radiation that a radioactive body can emit?
Answer
Alpha rays, beta rays and gamma rays.
What is released when two atoms separate?
Answer
Heat or thermal energy.
Does the electron behave like a particle or like a wave?
Answer
Like both, in fact, Louis Broglie discovered that they possess both behaviors.
What is the name of the material that can be permanently deformed by heat and pressure?
Answer
Thermostable.
What is shown in the picture?
Answer
Light emission spectra for three elements.
Can a chemical reaction be both exothermic and endothermic? Yes or no.
Answer
Not.
What is the atomic symbol for Mercury?
Answer
Hg.
What is the amount of space that a substance or thing occupies called??
Answer
Volume.
Is rust formation on a bicycle a physical or chemical change??
Answer
A chemical change.
In what state is the matter whose atoms are shown in the image??
Answer
In the solid state.
What is the name of the process in which matter goes from a liquid to a gaseous state?
Answer
Evaporation.
What is the quality of matter of being cold or hot called??
Answer
Temperature.
Who discovered oxygen in 1770?
Answer
Joseph Priestley.
Who proposed that equal volumes of gases under the same conditions of temperature and pressure contain the same number of molecules?
Answer
Amedeo Avogadro.
What is the name of the bond that holds the oppositely charged particles together??
Answer
Ionic bond.
What element has the chemical symbol "N"?
Answer
Nitrogen.
What was the first chemical reaction controlled by humans?
Answer
The fire.
What chemical transformation commonly occurs in wine?
Answer
Fermentation.
Who is this chemist?
Answer
Niels Bohr .
What charge do the neutrons have on the atom?
Answer
They have no charge, they are neutral particles.
What must we do to decondense matter?
Answer
Increase your temperature.
Who is known as the "father of modern chemistry"?
Answer
Antoine Lavoisier.
What is the name of the instrument used to measure the amounts of heat supplied or received by bodies??
Answer
Calorimeter.
What branch of chemistry studies the amounts of heat that accompany chemical reactions?
Answer
Thermochemistry.
What compound has the chemical formula NH3?
Answer
Ammonia .
What is the name of the process that separates the elements of a compound by means of electricity?
Answer
Electrolysis.
What are the compounds formed by ions called?
Answer
Ionic compounds.
What is the chemical symbol for Lead?
Answer
Its chemical symbol is Pb.
Burning a piece of wood, is it an exothermic or endothermic reaction?
Answer
Exothermic.
What happens when we increase the temperature of a gas? Does it expand or contract??
Answer
Gas expands.
Who invented dynamite?
Answer
Alfred Nobel.
Ionic bonds are relatively strong. True or false?
Answer
True.
What is the most widely used organic compound in the world?
Answer
Ethylene.
What are the dissolution reactions in which an insoluble compound is formed??
Answer
Precipitate reactions.
How many noble gases are there?
Answer
Six.
What is the most common element in oxides?
Answer
The Oxigen.
What unit of measurement of the concentration of a solution is expressed by the letter M?
Answer
Molarity.
What is the quantitative study of reactants and products in a chemical reaction called?
Answer
Stoichiometry.
What chemical element is seen in the image and what is its chemical symbol?
Answer
Copper, its chemical symbol is Cu.
What principle states that the position and velocity of an electron cannot be known at the same time?
Answer
Heisenberg's uncertainty principle.
What is the lightest noble gas?
Answer
Helium.
What radioactive element is shown in the image?
Answer
Uranium.
In which branch of chemistry is quantum mechanics applied??
Answer
In quantum chemistry.
What is the heaviest noble gas?
Answer
Radon.
What are the elements with metallic and non-metallic characteristics called at the same time??
Answer
Metalloids.
What element was initially called "dephlogistized air"?
Answer
The Oxigen.
What are halogen elements?
Answer
Bromine, iodine, chlorine, fluorine and astate.
What are the six elements of Group I of the periodic table called??
Answer
Alkali metals.
Mixtures are divided into two classes. Which are?
Answer
Homogeneous and heterogeneous.
To which substance does the molecule in the image?
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