Study sheet for Atomic Model quiz – Answers in RED
Atomic number = proton number = electron number
Atomic mass = # protons + # neutrons
Bohr-Rutherford model:
Simplified atomic model:
15P
16N
2e- 8e- 5eLewis dot diagram:
Valence electrons: 5
P
1.The number of electrons in an atom is the same as
a. the number of neutrons in the atom.
b. the mass number of the atom.
c. the number of protons in the atom.
d. the difference between the mass number and atomic number.
2. An atom with an atomic number of 38 and a mass number of 88 contains
a. 50 neutrons
b. 50 electrons
c. 38 neutrons
d.88 protons
3. Which of the following is the correct arrangement of electrons in a sulfur atom, atomic number 16?
a. 2, 8, 4, 2
b. 2, 8, 6
c. 6, 8, 2
d. 2, 6, 8
4. Draw Bohr-Rutherford diagram for
a. neon-21, atomic number 10, symbol Ne
N -11
b. fluorine, atomic number 9, symbol F
5. What element would professor Orbital Shell be working with in an experiment if that
element had an atomic mass number of 73 and an atomic number of 32?
(1) Ta;
(2) Ca;
(3) Ge;
(4) S;
(5) none of the above.
6.
X
Which of the following is most likely the element?
(1) K;
(2) Mg;
(3) Al;
(4) Si.
7. Which of the following statements is/are true about the atom shown below?
a. it has 25 protons
b. it has 25 neutrons
c. it has 29 electrons
1. only “a”
2. “a” and “b” only
3. “a” and “c” only
4. “b” and “c” only
8. Which of the following gives the correct Lewis dot diagram for iron (Fe)?
9. Which of the following gives the correct Lewis dot diagram for sulfur (S)?
10. Which sub-atomic particles have approximately the same size and mass?
11. Which symbol represents the atom with the largest number of neutrons?
13. Complete the following chart.
Element
Fe
Co
Br
Atomic
Number
# of
protons
26
27
35
Mass#
26
27
35
56
58
80
# of neutrons
30
31
125
Don’t worry
about the
number of
electrons in
this question
Si
Cd-112
Zr
14
48
40
14
48
40
28
112
91
14
64
51
14. In the space provided below:
Draw the Bohr-Rutherford diagram for Calcium
Draw the simplified model for Calcium
Draw the Lewis dot diagram for Calcium
20P
20N
2e- 8e- 8e- 2e-
Ca
15. Highlight, in different colors, the following groups: halogens, noble gases, alkaline earth metals, alkali
metals, metalloids, transition metals.