Atoms!!!

What is a chemical reaction?

• A process that leads to the transformation of one set of chemical substances to another.

• A method of separating mixtures into their components.

• A technique used to measure the pH of a solution.

• A way to combine different elements without changing their properties.

What is the chemical formula for water?

• H₂O

• CO₂

• NaCl

• C₆H₁₂O₆

How many elements are in the compound C₂H₈O?

• 2 (Carbon and Hydrogen)

• 3 (Carbon, Hydrogen, and Oxygen)

• 4 (Carbon, Hydrogen, Oxygen, and Nitrogen)

• 1 (Only Carbon)

What is the law of conservation of mass?

• The law states that mass is neither created nor destroyed in a chemical reaction.

• Mass can be created or destroyed in a chemical reaction.

• The law states that mass can change forms but is always conserved.

• Mass is only conserved in physical changes, not chemical reactions.

What is a compound?

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

• A mixture of different substances that can be separated by physical means.

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

• A solution where one substance is dissolved in another.

What is the atomic number?

• The number of neutrons in an atom

• The number of protons in the nucleus of an atom

• The total number of electrons in an atom

• The mass of an atom in atomic mass units

How many atoms are in 3H₂O₂?

• 10 atoms

• 12 atoms

• 8 atoms

• 14 atoms

What is the number of protons in a carbon atom?

• 4 protons

• 6 protons

• 8 protons

• 12 protons

What is a molecule?

• A single atom that cannot be broken down further.

• A group of two or more atoms bonded together.

• A type of chemical reaction between atoms.

• A substance that cannot exist independently.

What are elements?

• Elements are pure substances that cannot be broken down into simpler substances by chemical means.

• Elements are mixtures of different substances that can be separated by physical means.

• Elements are compounds made up of two or more different types of atoms.

• Elements are substances that can be created or destroyed in chemical reactions.