Biochemistry
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Period 2. Biochemistry. Lena Vincent Christina Rohall David Han Steven H ausman. Ionic bonds. Formed when one or more electrons are transferred from one atom to another An atom losing electrons becomes positively charged An atom gaining electrons becomes negatively charged

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Biochemistry

Period 2

Biochemistry

Lena Vincent

Christina Rohall

David Han

Steven Hausman


Ionic bonds
Ionic bonds

  • Formed when one or more electrons are transferred from one atom to another

  • An atom losing electrons becomes positively charged

  • An atom gaining electrons becomes negatively charged

  • These positively and negatively charged atoms are known as ions


Covalent bonds
Covalent Bonds

  • Forms when electrons are shared between atoms

  • Structure that results when atoms are joined together by covalent bonds is called a molecule


Ph scale
pH Scale

  • Used to indicate the concentration of H+ ions in a solution

  • Acidic solutions contain higher concentration of H+ ions than pure water, then it will have pH values below seven

  • Basic, or alkaline, solutions that contain lower concentrations of H+ ions than pure water, then it will have pH values above seven


Carbohydrates
Carbohydrates

  • Compounds made up of carbon, hydrogen, and oxygen atoms

  • Living things use carbohydrates as their main source of energy

  • Plants and some animals also use carbohydrates for structural purposes

  • Are made up of monosaccharaides and polysaccharides


Lipids
Lipids

  • Made mostly from carbon and hydrogen atoms

  • Lipids can be used to store energy

  • Some lipids are important parts of biological membranes and waterproof coverings

  • Fatty acid chains make up lipids


Nucleic acids
Nucleic Acids

  • Nucleic acids store and transmit hereditary, or genetic, information

  • Two types of nucleic acids: ribonucleic acid(RNA) and deoxyribonucleic acid(DNA)

  • Made up of nucleotides


Proteins
Proteins

  • Made up of amino acids

  • Some proteins control the rate of reactions and regulate cell processes

  • Others transport substances into or out of cells or help fight disease


Chemical reactions
Chemical Reactions

  • Processes that change or transform one set of chemicals into another

  • Chemical reaction always involves changes in the chemical bonds that join atoms in compounds


Lewis dot
Lewis Dot

  • Shows the number of electrons in the “outer shell” (valence electrons)

  • Can be used to determine how elements bond


Vocab
VOCAB

  • Mixture:material with two or more elements that are physically mixed, but not chemically mixed

  • Solution: mixture of two or more substances that are evenly distributed

  • Solute: substance that is dissolved in a solvent to form a solution

  • Solvent: substance in which a solute is dissolved to form a solution


Even more vocab
EVEN MORE VOCAB

  • Acid: compound that forms hydrogen ions(H+) in solutions

  • Base: compound that produces hydroxide ions(OH+) in solutions


Elements
Elements

Atomic Number

Element Symbol

Element Name

Atomic Mass



Multiple choice questions
Multiple Choice Questions!

  • What are the subatomic particles of an atom?

    • Protons, neutrons, electrons

    • Nucleus, protons, electrons

    • Only protons and neutrons

    • None of the above


  • What is the definition of cohesion?

    • When there is uneven distribution of electrons

    • Compound that produces hydroxide ions

    • Attraction between molecules of the same substance

    • Attraction between molecules of different substances


  • What does pH measure?

    • Concentration of only negative ions in a solution

    • Concentration of H+ ions in a solution

    • Concentration of OH- ions in a solution

    • None of the above









Answers
Answers

  • A

  • C

  • B

  • B

  • D

  • D

  • A

  • C

  • A

  • B


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