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Chem. 100 Exam II (Practice Test)
ATOMIC STRUCTURE:
The following information applies to subatomic particles. If the correct answer is Proton, mark “A,” neutron, mark “B,” electron, mark “C.” If the answer is correct for more than one, mark all correct answers.
- The mass of the particle doesn’t weigh enough to worry about.
- The mass of the particles is 1 a.m.u.
- This particle is located outside the nucleus.
- This particle is found only in the nucleus.
- This particle has a charge of –1.
- This particle has no charge.
- This particle has a charge of +1. 1
- The symbol of this particle is p+^ or H.
For the following element, 30 Zn^64 answer the following questions related to the configuration.
- The atom contains the following number of shells: (a) 3 (b) 5 (c) 4
- For this atom, shell #3 contains the following number of electrons: (a) 2 (b) 18 (c) 8
- This atom would have the following # of neutrons (in the nucleus): (a) 30 (b) 64 (c) 34
- This atom would have the following # of electrons (total): (a) 30 (b) 34 (c) 64
- This atom would have the following # of protons (in the nucleus): (a) 34 (b) 64 (c) 30
P 24
N 36
P 6
N 8
P 7
N 8
P 7
N 10
- Using the following diagrams, answer these questions: Mark “all” correct answers. a) b)
c) d)
a. Which are isotopes? b. Which is a metal? c. Which is a non-metal? d. Which is an ion? e. Which are atoms? f. What is the atomic number of element d? (a) 7 (b) 18 (c) 17
g. What is mass number of element b? (a) 8 (b) 10 (c) 15 (d) 25
h. Which element has 4 valence electrons?
- Draw the electron dot symbols for the following: a. francium d. CO 2 b. iodine e. CH 4 c. H 2 O
- Tell whether the following compounds are: (a) covalent (b) salt (c) acid (d) base
a. N 2 O 3 b. NH 4 C 2 H 3 O 2 c. SiS 2 d. NaHSO 4
e. PbI 2 f. H 2 SO 3 g. Al(OH) 3 h. Co2 S 3
i. FrOh j. NH 4 HSO 3 k. HI l. SnI 4
m. RbOH n. HClO 3
- The molar mass (mass of 1 mole) of CO is:
(a) 28g (b) 28 a.m.u. (c) 28 moles (d) 12 a.m.u. (e) 6.02 X 10 23
- The molar mass of A1(OH) 3 is:
(a) 87 (b) 46 (c) 78 (d) 64 (e) 108
- The molar mass of NH 4 HCO 3 is:
(a) 79 (b) 47 (c) 97
- The mass (in grams) of 3.0 moles of zinc is:
(a) 169.2 (b) 192.6 (c)196.
- How many moles of NO 2 are there in 9.2 grams of NO 2?
(a) 0.2 (b) 2.0 (c) 0.
- What is the mass (in grams) of 15.0 moles of H 2 O?
(a) 27 (b) 720 (c) 270
- How many moles of oxygen are there in 8g?
(a) 0.5 (b) 0.25 (c) 0.
Inter- and intraparticle forces:
- The measure of an atom’s attraction for the electron in a bond is called:
(a) electron affinity (b) electronegativity (c) electron attraction
- On the periodic chart, the electronegativity _________ as you proceed from left to right. (a) increases (b) decreases
- Which of the following elements has the greater electronegativity?
(a) Be (b) C (c) F
- Which of the following elements has the greater electronegativity?
(a) Na (b) Rb (c) Fr
- On the periodic chart, the electronegativity __________, as you go from the top of the chart to the bottom.
(a) increases (b) decreases
- Chemical bond that arises from the sharing of electrons between 2 atoms is called: (a) Ionic bond (b) Covalent bond (c) Ion-Dipole
- The attraction between the partially positive end of 1 polar molecule and the partially negative end of another polar molecule is called:
(a) Dipole-Dipole (b) Ion-dipole (c) Dipole-induced-dipole
- London forces is the attraction between:
(a) 2 atoms (b) 2 ions (c) 2 polar molecules
(d) nonpolar molecules (e) a molecule and an ion
- The “strongest” of all of the 7 bonds/forces studies is the:
(a) ionic bond (b) covalent bond (c) hydrogen bond
- A dipole-dipole is the attraction between:
(a) molecule/ion (b) polar/nonpolor molecule (c) 2 polar molecules
- The hydrogen bond, dipole-dipole, dipole-induced dipole, and London forces are all attractions between:
(a) molecules (b) ions (c) atoms
