Balanced Chemical Equations Quiz

Play an AI-generated podcast conversation about this lesson

What concept does a balanced chemical equation obey?

Avogadro's Law

Law of Conservation of Energy

Law of Conservation of Matter (correct)

Dalton's Atomic Theory

What is used to balance a chemical equation?

Coefficients (correct)

Atomic masses

Subscript numbers

Superscript numbers

Why should you never change the subscript numbers in a chemical equation?

It violates the Law of Conservation of Matter

It alters the chemical formula (correct)

It creates new elements

It changes the reactants and products

In balancing a chemical equation, which atoms are typically balanced first?

Atoms that appear in only a single molecule Signup and view all the answers

What principle does a chemical reaction obey when bonds are formed and broken?

Law of Conservation of Energy Signup and view all the answers

What are reactants in a chemical reaction?

The chemicals that go into the reaction Signup and view all the answers

What is the process where a gas is formed from a solid without passing through the liquid state?

Deposition Signup and view all the answers

Which substance classification has a pH above 7 according to the pH scale?

Bases Signup and view all the answers

What is the purpose of buffers in a solution?

Resist changes in pH Signup and view all the answers

What can happen if enzymes experience fluctuations in their optimal pH?

They malfunction Signup and view all the answers

What is the function of buffers in the blood?

To keep the pH constant for proper body function Signup and view all the answers

Who is known as the 'Father of the Periodic Table'?

Dmitri Mendeleev Signup and view all the answers

How are anions different from their parent atoms?

Anions have larger ionic radii Signup and view all the answers

How do cations differ from anions in terms of size?

Cations have smaller atomic radii Signup and view all the answers

What determines both the properties and reactivity of an atom?

The amount of valence electrons in an atom Signup and view all the answers

What is the main factor influencing the increase in ionization energy moving from left to right across a period?

Number of protons Signup and view all the answers

Why do atoms at the top right of the periodic table have higher ionization energy requirements?

They have more positively charged protons Signup and view all the answers

How does an increase in electron orbits affect ionization energy?

Decreases ionization energy Signup and view all the answers

Which factor neutralizes the positively charged nucleus, reducing its influence on valence electrons?

Number of electrons surrounding the nucleus Signup and view all the answers

How does moving down a group on the periodic table affect ionization energy?

Decreases Signup and view all the answers