Elements and Compounds

What is the difference between an element and a compound?

• An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

• An element can be broken down into simpler substances, while a compound cannot.

• A compound is a pure substance made of only one type of atom, while an element is made of two or more different types of atoms.

• Elements are always gases, while compounds can be solids, liquids, or gases.

What is a chemical formula?

• A method to calculate the mass of a compound.

• A way of representing a compound using symbols for its constituent elements and numbers to indicate the ratio of atoms.

• A technique for measuring the temperature of a substance.

• A formula used to determine the pH level of a solution.

What is the basic building block of matter?

• Molecule

• Atom

• Cell

• Particle

What is a compound?

• A compound is a chemical combination of two or more elements.

• A compound is a single element that cannot be broken down.

• A compound is a mixture of different substances without any chemical bonding.

• A compound is a type of solution that contains only one element.

What is a subscript in a chemical formula?

• A number that indicates the charge of an element

• A number to the lower right of an element symbol that represents the number of atoms for that element

• A symbol that represents a molecule

• A notation used to indicate the state of matter

What is the significance of coefficients in a chemical equation?

• Coefficients indicate the number of molecules or moles of a substance in a chemical reaction.

• Coefficients represent the temperature at which a reaction occurs.

• Coefficients are used to balance the charges in a chemical equation.

• Coefficients determine the color of the substances involved in the reaction.

What is an example of a compound?

• H2O (water), which is made of hydrogen and oxygen atoms.

• O2 (oxygen), which is a diatomic molecule.

• NaCl (sodium chloride), which is table salt.

• CO2 (carbon dioxide), which is a gas produced by respiration.

What is the difference between a molecule and a compound?

• A molecule is always made of different types of atoms, while a compound can be made of the same type of atoms.

• A molecule can be made of the same or different types of atoms, while a compound specifically consists of different types of atoms.

• A molecule is a type of compound that contains only one atom.

• A compound is a molecule that contains only one type of atom.

What are monatomic elements?

• Elements that can exist as a single atom.

• Elements that are composed of two or more atoms.

• Elements that can only exist in pairs.

• Elements that are found only in gaseous state.

What does it mean for an element to be diatomic?

• An element is diatomic if it naturally exists as two atoms bonded together, like N2 (nitrogen gas).

• An element is diatomic if it has a single atom in its molecular form.

• An element is diatomic if it can exist in three different states of matter.

• An element is diatomic if it is composed of more than two different types of atoms.