WorksheetsChem Semester 1 Exam Part 1
Total questions: 40
Worksheet time: 40mins
Name
Class
Date
1.
Which of the following elements has the greatest atomic radius?
a)
Al
b)
S
c)
Si
d)
C
2.
Which of the following element is NOT a metal?
a)
H
b)
K
c)
Na
d)
Fr
3.
Which of the following is the correct electron configuration for the element Aluminum (Al)?
a)
1s²2s²2p⁶3s²3p⁵
b)
1s²2s²2p¹
c)
1s²2s²2p⁶3s²3p¹
d)
1s²2s²2p⁶3s²3p⁶
4.
The s sublevel resembles this type of shape
a)
sphere
sphere
b)
dumbbell
dumbbell
c)
clover
clover
d)
fancy flower/double clover
fancy flower/double clover
5.
The metalloids are located on the periodic table between...
a)
halogens and noble gasses
b)
nonmetals and metals
c)
alkaline earth metals and other metals
d)
alkali metals and transition metals
6.
An element that has the electron configuration ending in p⁵ is in Group...
a)
2
b)
5
c)
7
d)
17
7.
Elements in Group 18 have...
a)
very low reactivity
b)
good conductivity
c)
very high reactivity
d)
metallic character
8.
Which of the following is the electron configuration for Fluorine (F)?
a)
a) 1s¹2s²2p⁵
b)
b) 1s²2s²2p⁵
c)
c) 1s²2s²2p⁶
d)
d) 1s²2s¹2p⁵
9.
Elements in a group or column in the periodic table can be expected to have similar
a)
atomic masses
b)
atomic numbers
c)
numbers of neutrons
d)
properties
10.
Which of the following is the correct electron configuration for the element Boron (B)?
a)
1s²2p²2s²
b)
1s²2s²2p¹
c)
1s²2s²2p²
d)
1s²2s²2p³
11.
Look at the element symbol. What is the mass number?
a)
31
b)
15
c)
16
d)
46
12.
Look at the element symbol. How many protons does it have?
a)
31
b)
15
c)
16
d)
46
13.
Look at the element symbol. How many neutrons does it have?
a)
31
b)
15
c)
16
d)
46
14.
The nucleus of an atom is:
a)
Positively charged and has a low density.
b)
Negatively charged and has a low density.
c)
Negatively charged and has a high density.
d)
Positively charged and has a high density.
15.
Which one of these statements is FALSE?
a)
Electrons have a significant mass
b)
Electrons have a negative charge.
c)
The neutron is found in the nucleus of the atom.
d)
The nucleus of an atom is positively charged.
16.
An atom of an element with atomic number 48 and mass number 120 contains:
a)
120 protons, 48 electrons and 72 neutrons
b)
72 protons, 72 electrons and 48 neutrons
c)
48 protons, 48 electrons and 72 neutrons
d)
72 protons, 48 electrons and 48 neutrons
17.
The number 80 in the name Bromine-80 represents:
a)
the sum of protons and electrons
b)
the mass number
c)
the atomic number
d)
None of these
18.
Which one of these statements is NOT true?
a)
Atoms of the same element can have different masses.
b)
Atoms are mostly empty space.
c)
The nucleus of an atom has a positive charge.
d)
Isotopes of an element have different numbers of protons.
19.
A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)
a)
nuclide
b)
electron
c)
neutron
d)
isotope
20.
Which image represents Bohr's model of an atom?
a)
Model 1
Model 1
b)
Model 2
Model 2
c)
Model 3
Model 3
d)
Model 4
Model 4
21.
At atom or group of atoms with a positive or negative charge.
a)
Isotope
b)
Ion
c)
Neutral
d)
Gained
22.
Anions are formed by electrons being:_______
a)
lost
b)
gained
c)
neutral
d)
metals
23.
Isotopes have the same number of protons, but have a different number of:
a)
electrons
b)
neutrons
c)
ions
d)
metals
24.
In an atom, when the atomic number equals the number of electrons the atom is said to be:
a)
cation
b)
anion
c)
neutral
d)
ion
25.
Cations are formed by electrons being:
a)
lost
b)
gained
c)
neutral
d)
nonmetals
26.
What is an example of a qualitative observation below?
a)
My water temperature is 96 degrees Celsius.
b)
My water volume measures 25mL.
c)
The mass of my water is 34.2 g.
d)
My water appears to be colorless.
27.
Approved eye protection devices (such as goggles) are worn in the laboratory
a)
to avoid eye strain.
b)
to improve your vision.
c)
only if you don’t have corrective glasses.
d)
any time chemicals, heat or glassware are used.
28.
All unauthorized experiments are prohibited
a)
True
b)
False
29.
How many significant figures are in the number 0.020140
a)
A) four
b)
B) five
c)
C) seven
d)
D) three
30.
If some measurements agree closely with each other but differ widely from the actual value, these measurements are:
a)
A) neither precise nor accurate
b)
B) precise but not accurate
c)
C) accurate but not precise
d)
D) both accurate and precise
31.
A measurement that is accurate is one that:
a)
A) contains five decimal places.
b)
B) contains at least four significant figures
c)
C) is as exact as possible.
d)
D) is close to the true value.
32.
Which of the following observations is quantitative?
a)
A) The liquid turns blue litmus paper red.
b)
B) The liquid boils at 100⁰C.
c)
C) The liquid tastes bitter.
d)
D) The liquid is cloudy.
33.
Written in scientific notation, the measurement 0.000065cm is:
a)
A) 65 X 10⁻⁴ cm
b)
B) 6.5 X 10⁻⁴ cm
c)
C) 6.5 X 10⁻⁵ cm
d)
D) 6.5 X 10 ⁻⁶ cm
34.
What is 78,900,000,000 expressed in scientific notation?
a)
A) 78.9 X 10⁸
b)
B) 7.89 X 10¹⁰
c)
C) 789 X 10⁹
d)
D) 7.89 X 10⁹
35.
Read the ruler in centimeters. Be sure to give all the numbers directly read plus one estimated digit. Record your answer with the correct unit.
a)
57.3 cm
b)
57.4 cm
c)
57.30 cm
d)
57.40 cm
36.
Read the following graduated cylinder. Be sure to read all numbers directly plus one estimated digit. Record your answer with the correct unit.
a)
4.65 mL
b)
4.6 mL
c)
4.50 mL
d)
4.60 mL
37.
Read the following ruler. Be sure to read all numbers directly plus one estimated digit. Record your answer with the correct unit.
a)
8.20 cm
b)
8.25 cm
c)
8.2 cm
d)
8.3 cm
38.
Read the following graduated cylinder. Be sure to read all numbers directly plus one estimated digit. Record your answer with the correct unit.
a)
73.0 mL
b)
73 mL
c)
73.5 mL
d)
74.0 mL
39.
Read the following thermometer. Be sure to read all numbers directly plus one estimated digit. Record your answer with the correct unit.
a)
40.0 C
b)
43.0 C
c)
42.0 C
d)
43.5 C
40.
How many significant figures are in the following number: 8675309
a)
A) seven
b)
B) six
c)
C) five
d)
D) four
100 %
