WorksheetsBasic Chemistry Concepts
Total questions: 20
Worksheet time: 10mins
molecular formula
A formula that specifies the actual number of atoms of each element in one molecule of a substance
A formula that represents the simplest whole-number ratio of elements in a compound
A formula that shows the arrangement of atoms in a molecule
A formula that indicates the total number of atoms in a compound without specifying their types
phase of matter
The different forms that matter can take depending on its temperature and pressure; typically solid, liquid, or gas
A term used to describe the chemical composition of a substance
The process by which matter changes from one state to another
A measurement of the density of a substance
stoichiometry
The study of quantitative relationships between the amounts of reactants used and products formed by a chemical reaction; is based on the law of conservation of mass
The process of balancing chemical equations to ensure equal numbers of atoms on both sides
The measurement of the speed at which a chemical reaction occurs
The analysis of the energy changes that occur during a chemical reaction
solid
Has a fixed shape and volume
Can change shape and volume
Has no definite shape but a definite volume
Is always liquid at room temperature
element
A pure substance that cannot be broken down into simpler substances by physical or chemical means and still maintain its original properties
A mixture of two or more substances that can be separated by physical means
A compound formed by the chemical combination of two or more elements
A substance that can be broken down into simpler substances by chemical means
mole
A unit of measurement for temperature
The counting unit used in chemistry to measure the amount of a substance; equal to 6.02x10^23 representative particles
A type of chemical bond
A measure of the volume of a gas
electron
A positively charged particle found in the nucleus of an atom
A negatively charged particle that moves through the empty space surrounding an atom’s nucleus
A neutral particle that is part of the nucleus of an atom
A particle that has no charge and is found in the electron cloud
gas
Fills the shape and volume of the container it is in
Has a definite shape and volume
Is incompressible and rigid
Has a fixed volume but no fixed shape
product
A substance formed during a chemical reaction
A type of chemical bond
A catalyst that speeds up reactions
A reactant that is consumed
matter
Anything that has volume and mass
A substance that can be seen and touched
A type of energy that can be measured
A concept that describes the absence of substance
reactant
A starting substance in a chemical reaction
A product formed after a chemical reaction
A catalyst that speeds up a chemical reaction
A substance that inhibits a chemical reaction
liquid
Has a fixed volume, but takes the shape of the container it is in
Has a fixed shape and volume
Takes the shape of the container but has no fixed volume
Is compressible and has no fixed volume
volume
The amount of two-dimensional (2D) space matter occupies
How much three-dimensional (3D) space matter occupies
The weight of an object in a gravitational field
The density of a substance in a given volume
neutron
A positively charged particle in an atom’s nucleus
A neutral, subatomic particle in an atom’s nucleus
A negatively charged particle that orbits the nucleus
A particle that determines the atomic number of an element
chemistry
The study of matter and the changes that it undergoes.
The study of living organisms and their interactions.
The study of celestial bodies and the universe.
The study of energy and its transformations.
mass
The measure of an object’s resistance to any type of force
The amount of space an object occupies
The speed at which an object moves
The temperature of an object
nucleus
The center of an atom (or ion) that contains protons and neutrons
The outer layer of an atom that contains electrons
A type of subatomic particle found in the nucleus
A region where chemical reactions occur
atomic number
The number of protons in an atom
The total number of electrons in an atom
The sum of protons and neutrons in an atom
The mass of an atom in atomic mass units
proton
A subatomic particle in an atom’s nucleus that has a positive charge
A negatively charged particle found outside the nucleus
A neutral particle that contributes to the mass of an atom
A particle that orbits the nucleus and has no charge
empirical formula
A formula that shows the actual number of atoms in a molecule.
A formula that shows the smallest whole-number mole ratio of the elements of a compound, and might or might not be the same as the actual molecular formula.
A formula that represents the structure of a compound in detail.
A formula that indicates the percentage composition of each element in a compound.
