20 Questions
What concept does a balanced chemical equation obey?
Law of Conservation of Matter
What is used to balance a chemical equation?
Coefficients
Why should you never change the subscript numbers in a chemical equation?
It alters the chemical formula
In balancing a chemical equation, which atoms are typically balanced first?
Atoms that appear in only a single molecule
What principle does a chemical reaction obey when bonds are formed and broken?
Law of Conservation of Energy
What are reactants in a chemical reaction?
The chemicals that go into the reaction
What is the process where a gas is formed from a solid without passing through the liquid state?
Deposition
Which substance classification has a pH above 7 according to the pH scale?
Bases
What is the purpose of buffers in a solution?
Resist changes in pH
What can happen if enzymes experience fluctuations in their optimal pH?
They malfunction
What is the function of buffers in the blood?
To keep the pH constant for proper body function
Who is known as the 'Father of the Periodic Table'?
Dmitri Mendeleev
How are anions different from their parent atoms?
Anions have larger ionic radii
How do cations differ from anions in terms of size?
Cations have smaller atomic radii
What determines both the properties and reactivity of an atom?
The amount of valence electrons in an atom
What is the main factor influencing the increase in ionization energy moving from left to right across a period?
Number of protons
Why do atoms at the top right of the periodic table have higher ionization energy requirements?
They have more positively charged protons
How does an increase in electron orbits affect ionization energy?
Decreases ionization energy
Which factor neutralizes the positively charged nucleus, reducing its influence on valence electrons?
Number of electrons surrounding the nucleus
How does moving down a group on the periodic table affect ionization energy?
Decreases
Test your understanding of how to balance chemical equations using coefficients to ensure the number of atoms for each element is equal on both sides of the equation. Learn about the law of conservation of matter and why it's important to not change subscript numbers in a chemical equation.
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