Atoms Elements Molecules

What is the difference between an element and a compound?

• An element is made of one type of atom, while a compound is made of two or more different types of atoms.

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

• An element is a pure substance, while a compound is a mixture of substances.

• An element contains multiple types of atoms, while a compound contains only one type of atom.

What subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Photon

What is the Periodic Table?

• A chart that organizes all known elements by their atomic number and properties.

• A list of all known chemical compounds.

• A graphical representation of chemical reactions.

• A table that shows the history of chemistry.

What is the formula for glucose?

• C6H12O6

• C5H10O5

• C6H10O6

• C6H12O5

How many atoms are in a molecule of glucose (C6H12O6)?

• 18 atoms (6 carbon, 12 hydrogen)

• 20 atoms (6 carbon, 14 hydrogen)

• 22 atoms (6 carbon, 12 hydrogen, 4 oxygen)

• 24 atoms (6 carbon, 12 hydrogen, 6 oxygen)

What is a mixture?

• A combination of two or more substances that are not chemically bonded.

• A single substance with uniform composition.

• A chemical reaction between two or more elements.

• A solution where one substance is dissolved in another.

What is the atomic number of an element?

• The number of protons in the nucleus of an atom.

• The total number of electrons in an atom.

• The number of neutrons in the nucleus of an atom.

• The mass of an atom measured in atomic mass units.

What is a molecule?

• A single atom that cannot be divided.

• A group of two or more atoms bonded together.

• A type of chemical reaction.

• A substance that cannot exist independently.

What is a compound?

• A substance formed when two or more different elements are chemically bonded together.

• A mixture of two or more substances that retain their individual properties.

• A single element that cannot be broken down into simpler substances.

• A solution where one substance is dissolved in another.

What is an element?

• A pure substance made of only one type of atom.

• A mixture of different types of atoms.

• A compound formed by chemical reactions.

• A gas that can be compressed easily.