Biology 1201 Exam 1 Updated Actual Questions And Correct Answers

BIOLOGY 1201 EXAM 1 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS


◉ Which of these relationships is true of an uncharged atom?
Answer: The number of protons is equal to the number of
electrons.


◉ What determines the types of chemical reactions that an atom
participates in?
Answer: the number of electrons in the outermost electron shell
(stable)


◉ What is the atomic number of an atom that has 6 protons, 6
neutrons, and 6 electrons?
Answer: 6


◉ Which of these refers to atoms with the same atomic number
but different atomic masses?
Answer: they are isotopes


◉ Fluorine's atomic number is 9 and its atomic mass is 19. How
many neutrons does fluorine have?
Answer: 10 neutrons

, ◉ An uncharged atom of boron has an atomic number of 5 and an
atomic mass of 11. How many protons does boron have?
Answer: 5 protons


◉ what is atomic mass?
Answer: the number of protons plus the number of neutrons


◉ What type of bond is joining the two hydrogen atoms?
Answer: covalent


◉ A(n) _____ refers to two or more atoms held together by covalent
bonds.
Answer: molecule


◉ This atom can form up to _____ single covalent bond(s).
Answer: four


◉ A(n) _____ bond joins these two oxygen atoms.
Answer: double covalent


◉ What is the pH of an aqueous solution with the hydronium ion
concentration [H3O+] = 2 x 10-14 M ?
Answer: -log(2 x 10^-14) = 13.7