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Questions and Answers
What is the primary difference between ionic and covalent bonds?
What is the primary difference between ionic and covalent bonds?
- Ionic bonds involve the sharing of electrons.
- Covalent bonds form between metals and non-metals.
- Ionic bonds result from the transfer of electrons. (correct)
- Covalent bonds are typically weaker than ionic bonds.
Which model describes the atom as having a nucleus surrounded by electrons in specific energy levels?
Which model describes the atom as having a nucleus surrounded by electrons in specific energy levels?
- Rutherford's Model
- Dalton's Model
- Thomson's Model
- Bohr's Model (correct)
Which of the following accurately represents the Law of Conservation of Mass?
Which of the following accurately represents the Law of Conservation of Mass?
- The total mass of reactants equals the total mass of products. (correct)
- Mass and energy are interchangeable during a reaction.
- Mass can be created during a chemical reaction.
- Mass can be destroyed during a chemical reaction.
What is an example of a reaction involving acids and bases?
What is an example of a reaction involving acids and bases?
Which of the following statements about isotopes is correct?
Which of the following statements about isotopes is correct?
What is the main purpose of the innate immune system?
What is the main purpose of the innate immune system?
What role do phagocytes like macrophages play in the innate immune system?
What role do phagocytes like macrophages play in the innate immune system?
Why does the body increase temperature during an inflammatory response?
Why does the body increase temperature during an inflammatory response?
What occurs when the body's local innate defenses become overwhelmed?
What occurs when the body's local innate defenses become overwhelmed?
What is the significance of isotopes in industry?
What is the significance of isotopes in industry?
What does a half-life of a radioactive isotope indicate?
What does a half-life of a radioactive isotope indicate?
What is one advantage of using isotopes in industries?
What is one advantage of using isotopes in industries?
What is the role of natural killer cells in the innate immune system?
What is the role of natural killer cells in the innate immune system?
What is produced during cellular respiration along with energy?
What is produced during cellular respiration along with energy?
Which of the following substances is classified as an acid?
Which of the following substances is classified as an acid?
What type of reaction occurs when an acid neutralizes a base?
What type of reaction occurs when an acid neutralizes a base?
In which of the following reactions is hydrogen gas produced?
In which of the following reactions is hydrogen gas produced?
What is the pH range of substances classified as bases?
What is the pH range of substances classified as bases?
What is formed when an acid reacts with a carbonate?
What is formed when an acid reacts with a carbonate?
Which chemical equation correctly represents the formation of a salt from an acid and a base?
Which chemical equation correctly represents the formation of a salt from an acid and a base?
What is the role of acids in aqueous solutions?
What is the role of acids in aqueous solutions?
What is the primary function of the brain?
What is the primary function of the brain?
What is the process of bringing oxygen into the body called?
What is the process of bringing oxygen into the body called?
Which organ functions primarily to pump blood and oxygen throughout the body?
Which organ functions primarily to pump blood and oxygen throughout the body?
What is one of the functions of the intestines beyond digestion?
What is one of the functions of the intestines beyond digestion?
What is homeostasis?
What is homeostasis?
How do muscles contribute to movement?
How do muscles contribute to movement?
What might happen if homeostasis is unsuccessful?
What might happen if homeostasis is unsuccessful?
What role do the lungs play in respiration?
What role do the lungs play in respiration?
What is the charge of a neutron?
What is the charge of a neutron?
Which principle is essential for accurately performing stoichiometry calculations?
Which principle is essential for accurately performing stoichiometry calculations?
How many electrons can the second energy level (L Shell) hold?
How many electrons can the second energy level (L Shell) hold?
What does the atomic number (Z) of an element represent?
What does the atomic number (Z) of an element represent?
Which of the following statements about isotopes is correct?
Which of the following statements about isotopes is correct?
In the electron configuration of sodium (Na), how many electrons are in the third energy level?
In the electron configuration of sodium (Na), how many electrons are in the third energy level?
Which of the following is a fundamental principle that the Law of Conservation of Mass has been experimentally verified?
Which of the following is a fundamental principle that the Law of Conservation of Mass has been experimentally verified?
What is the maximum number of electrons that the first energy level (K Shell) can hold?
What is the maximum number of electrons that the first energy level (K Shell) can hold?
Study Notes
Cellular Respiration
- Cellular respiration is a process where glucose is broken down to release energy, carbon dioxide, and water.
- Glucose + Oxygen → Carbon Dioxide + Water + Energy
- C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy
Acids
- Acids are substances that release hydrogen ions (H⁺) in solution
- Acids have a pH of less than 7
- Acids turn blue litmus paper red
- Common acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3), and acetic acid (CH3COOH).
Bases
- Bases accept protons or donate hydroxide ions (OH⁻) in solution.
- Bases have a pH greater than 7
- Bases turn red litmus paper blue
- Common bases include sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca(OH)2), and ammonia (NH3).
Acid-Base Neutralization
- Acid + Base → Water + Salt
- HCl + NaOH → H2O + NaCl
Formation of Salts
- Salts are formed when an acid reacts with a base
- Acid + Base → Salt + Water
- H2SO4 + 2KOH → K2SO4 + 2H2O
Acid-Base Reactions with Metals
- Acids react with metals to form a salt and hydrogen gas.
- Acid + Metal → Salt + Hydrogen Gas
- 2HCl + Zn → ZnCl2 + H2
Neutralisation of Carbonates and Hydrogen Carbonates
- Acids react with carbonates and hydrogen carbonates to form carbon dioxide, water, and a salt.
- Acid + Carbonate/Bicarbonate → Carbon Dioxide + Water + Salt
- 2HCl + Na2CO3 → 2NaCl + H2O + CO2
Reaction with Ammonia
- Acids react with ammonia to form ammonium salts.
Basic Structure of Atoms
- The nucleus of an atom contains protons and neutrons.
- Protons are positively charged, while neutrons are neutral.
- The electron cloud surrounds the nucleus and contains negatively charged electrons.
- Electrons occupy specific energy levels or shells.
Subatomic Particles
- Protons: Positively charged, found in the nucleus, determine the element's atomic number (Z)
- Neutrons: Neutral, found in the nucleus, contribute to the atomic mass.
- Electrons: Negatively charged, found in the electron cloud, occupy specific energy levels (shells), and the number of electrons equals the number of protons in a neutral atom.
Energy Levels or Shells
- First Energy Level (K Shell): Closest to the nucleus, holds up to 2 electrons.
- Second Energy Level (L Shell): Further from the nucleus, holds up to 8 electrons
- Third Energy Level (M Shell): Further from the nucleus than the second shell, holds up to 18 electrons
Electron Configuration
- Electron configuration is the arrangement of electrons in the energy levels of an atom.
- It follows the Aufbau principle, Pauli exclusion principle, and Hund's rule.
Isotopes
- Isotopes are atoms of the same element, but with different numbers of neutrons.
Homeostasis
- Homeostasis is any self-regulating process by which an organism maintains stability.
- Homeostasis is essential for survival, and failure to maintain it can lead to disaster or death.
Organ System Functions
- Brain: Controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger, and regulates bodily processes.
- Lungs: Allow for breathing, taking in oxygen (inspiration) and sending out carbon dioxide (expiration).
- Heart: Pumps blood and oxygen through the body and delivers waste products to the lungs.
- Intestines: Digest food, produce hormones, fight germs, and regulate water balance.
- Muscles: Help with movement, carry body weight, and support during standing.
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Description
Explore the processes of cellular respiration, acids, bases, and acid-base neutralization. This quiz covers key reactions, properties of acids and bases, and the formation of salts. Test your understanding of these fundamental concepts in biology and chemistry.