5 Written questions
5 Matching questions
- Define electrolyte balance.
- What is atomic radiation?
- What is the relationship between matter and elements?
- Explain how electrons are distributed within the electron shell of atoms.
- An ionic bond forms when? A covalent bond forms when?
- a Energy or atomic fragments they emit.
- b All matter is composed of fundamental substances.
- c Each electron shell can hold a limited # of electrons. The maximum number of electrons that each of the 1st three shells can hold for elements of atomic number 18 and under is ...1st shell ( close to the nucleus) 2 e-, second shell 8 e-, third shell 8 e-. More complex atoms may have as many as 18 e- in the 3rd shell.
- d Ionic: ions with opposite electrical charges attract
Covalent: a chemical bond between atoms that share electrons.
- e The body regularly gains and loses these electrolytes, but they must be present in certain concentrations, both inside and outside cells, to maintain homeostasis.
5 Multiple choice questions
- Atoms that have the same atomic number but different atomic weight.
- Molecular: consists of the symbols of the elements in the molecule with numerical subscripts that indicate how many atoms of each element are present.
Structural: representation of the way atoms bond in a molecule.
- Simple: sugars include monosaccharaides, disaccharides; straight chains or rings.
Complex: polysaccharides are built of simple carbohydrates made of many bonded glucose molecules chains of sugars, cant digest.
- Chemistry of living organisms, a field of life science.
- The solution at pH 6.4 has 100 times the hydrogen ion concentration of a solution at pH 8.42.
5 True/False questions
Explain why some atoms are chemically inert. → Synthesis: when 2 or more atoms, ions, or molecules bond to form a more complex structure A+B->AB
Decomposition: bonds of a reactant molecule break to form simpler molecules, atoms, or ions AB->A+B
Exchange: parts of 2 different types of molecular trade positions as bonds are broken and new are formed AB + CD-> AD+ BC
Reversible: product or products can change back to reactant or reactants A+B<-> AB
How does the number of protons in a water molecule compare with the number of electrons? → the nucleus of an atom.
What are the general difference between an organic molecule and an inorganic molecule? → Organic: compounds have carbon and hydrogen.
Inorganic: all other chemicals, chemicals that does not include both carbon and hydrogen atoms.
What does the pH scale measure? → tracks the number of decimal places in a hydrogen ion concentration without writing them out.
What is an Ion? → Atoms that have the same atomic number but different atomic weight.