VISUAL ANATOMY AND PHYSIOLOGY CHAPTER 27 ACTUAL TEST PAPER QUESTIONS AND SOLUTIONS GRADED A+

VISUAL ANATOMY AND PHYSIOLOGY
CHAPTER 27 ACTUAL TEST PAPER QUESTIONS
AND SOLUTIONS GRADED A+

◉ neutron.
Answer: subatomic particle with a neutral charge


◉ compound.
Answer: atoms of two or more different elements bonded together
in a fixed proportion to create a substance; example is H2O


◉ hydrogen bond.
Answer: attractive force between water molecules


◉ protons.
Answer: positive charge


◉ electrons.
Answer: subatomic particle with a negative charge


◉ mass.

,Answer: a physical property that determines the weight of an object
in Earth's gravitational field (heavy objects have more mass than
lighter objects) = the amount of material in matter


◉ trace elements.
Answer: elements found in very small amounts in the human body


◉ element.
Answer: substance composed only of atoms with same atomic
number


◉ atom.
Answer: smallest particle that still retains the properties of an
element


◉ subatomic particles.
Answer: protons, neutrons, electrons


◉ atomic number.
Answer: # of protons in an atom


◉ mass number.
Answer: # of protons and neutrons in an atom

, ◉ atomic weight.
Answer: average mass of an atom (Dalton)


◉ isotopes.
Answer: different forms of the same element that differ in the
number of neutrons (so have different mass numbers)


◉ electron shells (energy levels).
Answer: regions within the electron cloud in which electrons
circulate


◉ reactive elements.
Answer: atoms having unfilled outermost energy levels


◉ inert elements.
Answer: atoms that have filled outermost energy levels


◉ ion.
Answer: atoms that have gained or lost electrons


◉ cation.