CHEMICAL PRINCIPLES CHAPTER 2 ACTUAL TEST PAPER QUESTIONS AND SOLUTIONS GRADED A+

CHEMICAL PRINCIPLES CHAPTER 2 ACTUAL
TEST PAPER QUESTIONS AND SOLUTIONS
GRADED A+

◉ Element.
Answer: can't be broken down into other substances by chemical
rxns


◉ Isotopes.
Answer: element w/ same # of protons but diff. # of neutrons


◉ Compound.
Answer: molecule contains 2 diff. kinds of elements in fixed ratio


◉ Covalent bonds.
Answer: Chemical bonds formed by sharing of electrons between
atoms.


◉ Ionic bonds.
Answer: attraction btwn ions of opposite charge that hold them
together to form stable molecule (ion, cation, anion)
Ex: Na(+)Cl(-)

, ◉ Hydrogen Bonds.
Answer: weak attraction btwn a positive hydrogen atom and a
negative atom O, N, or F ONLY


◉ Organic ***.
Answer: C to C bond or C to H; JUST HAVING A (C) ALONE = NOT
ORGANIC THERE NEEDS TO BE ANOTHER (C) BONDED


◉ Inorganic ***.
Answer: Does not contain carbon, typically other elements
Ex: H2O


◉ 4 Macromolecules.
Answer: carbohydrates, nucleic acids, lipids (fats), protein


◉ Carbohydrates.
Answer: sugars & starches (organic comp), has C, H, O with H & O in
2:1 ratio
- CH2O


◉ Monosaccharide.