WorksheetsFundamentals of Chemistry
Total questions: 20
Worksheet time: 10mins
What is the basic unit of matter?
compound
atom
molecule
cell
What particles make up an atom?
Protons, electrons, and positrons
Protons, neutrons, and electrons
Neutrons, electrons, and quarks
Photons, neutrons, and muons
What is the charge of a proton?
+1 elementary charge
+2 elementary charge
0 elementary charge
-1 elementary charge
What is the difference between an element and a compound?
Elements can be broken down into simpler substances, while compounds cannot be.
An element can be made of multiple types of atoms, while a compound is made of a single type of atom.
A compound is a pure substance, while an element is a mixture of different substances.
An element consists of one type of atom, while a compound consists of two or more different elements chemically bonded together.
What is the octet rule in atomic structure?
The octet rule is a principle in atomic structure that suggests atoms seek to have eight electrons in their outermost shell.
Atoms are stable with four electrons in their outermost shell.
The octet rule states that atoms can have any number of electrons in their outer shell.
Atoms prefer to have six electrons in their outermost shell.
What type of bond involves the sharing of electrons?
Ionic bond
Covalent bond
Hydrogen bond
Metallic bond
What type of bond involves the transfer of electrons?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
What is the term for a substance made of two or more elements chemically combined?
Mixture
Solution
Element
Compound
What are the three main states of matter?
solid, liquid, plasma
solid, liquid, gas
plasma, vapor, foam
gas, liquid, crystal
What is the process called when a solid turns into a liquid?
Condensation
Freezing
Sublimation
Melting
What is pH a measure of?
pH is a measure of electrical conductivity.
pH is a measure of hydrogen ion concentration.
pH is a measure of temperature.
pH is a measure of pressure.
What is a strong acid?
A strong acid is a weak acid that has a high concentration.
A strong acid is an acid that partially ionizes in solution.
A strong acid is an acid that does not ionize in solution.
A strong acid is an acid that fully ionizes in solution.
What is a weak base?
A weak base is a substance that partially ionizes in solution.
A weak base is a strong electrolyte that dissociates fully in water.
A weak base is a substance that completely ionizes in solution.
A weak base has a high pH and does not react with acids.
What is the law of conservation of mass?
Mass is only conserved in physical changes.
Mass can be created in chemical reactions.
Mass can be destroyed during a reaction.
Mass is conserved in chemical reactions; it cannot be created or destroyed.
What is a reactant in a chemical reaction?
A reactant is a catalyst that speeds up a chemical reaction.
A reactant is a substance that is produced in a chemical reaction.
A reactant is a substance that is consumed in a chemical reaction.
A reactant is a type of energy released during a chemical reaction.
What is the product of a chemical reaction?
Products of a chemical reaction are the substances formed as a result of the reaction.
The reactants of a chemical reaction
The energy released during a reaction
The temperature at which a reaction occurs
What is an exothermic reaction?
An exothermic reaction is a reaction that releases energy, usually in the form of heat.
An exothermic reaction is a type of chemical reaction that does not involve heat.
An exothermic reaction occurs only in gases.
An exothermic reaction absorbs energy from the surroundings.
What is an endothermic reaction?
A reaction that occurs without any temperature change.
An endothermic reaction is a reaction that absorbs heat.
A reaction that releases heat.
A reaction that only occurs in the presence of a catalyst.
What is the role of a catalyst in a chemical reaction?
A catalyst changes the products of a chemical reaction.
A catalyst is a substance that is consumed in a chemical reaction.
A catalyst speeds up a chemical reaction by lowering activation energy.
A catalyst slows down a chemical reaction by increasing activation energy.
What is the difference between a physical change and a chemical change?
A physical change creates new substances, while a chemical change does not.
A physical change involves a change in temperature, while a chemical change does not.
A physical change does not alter the chemical composition, while a chemical change results in new substances.
A physical change is reversible, while a chemical change is always irreversible.
