WorksheetsReview Chemistry Midterm Exam
Total questions: 45
Worksheet time: 23mins
Name
Class
Date
1.
Energy required to remove an electron from an atom is called
a)
electronegativity
b)
ionization energy
c)
atomic radius
2.
Which type of element characterized by the presence of electrons in the d orbital?
a)
non-metal
b)
metal
c)
transition metal
3.
Which type of element that is a good conductor of heat and electric current?
a)
non-metal
b)
metal
c)
neither
d)
both
4.
Which discovery did J. J. Thomson make that improved upon Dalton's atomic theory?
a)
Atoms contain tiny, negatively charged electrons.
b)
Atoms are always in motion.
c)
Atoms contain a tiny, positively charged nucleus.
d)
Atoms that combine do so in simple whole-number ratios.
5.
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____.
a)
152 protons and 76 electrons
b)
76 protons and 0 electrons
c)
38 protons and 38 electrons
d)
76 protons and 76 electrons
6.
The sum of the protons and neutrons in an atom equals the ____.
a)
atomic number
b)
nucleus number
c)
atomic mass
d)
mass number
7.
What does the number 84 in the name krypton-84 represent?
a)
the atomic number
b)
the mass number
c)
the sum of the protons and electrons
d)
twice the number of protons
8.
In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly?
a)
In, 49 protons, 49 electrons
b)
Zn, 30 protons, 60 electrons
c)
Cs, 55 protons, 132.9 electrons
d)
F, 19 protons, 19 electrons
9.
Using the periodic table, determine the number of neutrons in Oxygen.
a)
4
b)
8
c)
16
d)
24
10.
How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?
a)
50 protons, 50 electrons, 75 neutrons
b)
75 electrons, 50 protons, 50 neutrons
c)
120 neutrons, 50 protons, 75 electrons
d)
70 neutrons, 75 protons, 50 electrons
11.
If E is the symbol for an element, which two of the following symbols represent isotopes of the same element?
a)
1 and 2
b)
3 and 4
c)
1 and 4
d)
2 and 3
12.
What is the maximum number of f orbitals in any single energy level in an atom?
a)
1
b)
3
c)
5
d)
7
13.
What is the maximum number of d orbitals in a principal energy level?
a)
1
b)
2
c)
3
d)
5
14.
What is the maximum number of orbitals in the p sublevel?
a)
2
b)
3
c)
4
d)
5
15.
What is the electron configuration of potassium?
a)
1s²2s²2p3s²3p²4s¹
b)
1s²2s²2p3s²3p⁶
c)
1s²2s²2p⁶3s²3p⁶4s¹
d)
1s²2s²2p⁶3s²3d¹
16.
Which of the following elements is in the same period as phosphorus?
a)
carbon
b)
magnesium
c)
nitrogen
d)
oxygen
17.
Which of the following categories includes the majority of the elements?
a)
metalloids
b)
liquids
c)
metals
d)
nonmetals
18.
What element has the electron configuration of 1s²2s²2p3s²3p²
a)
nitrogen
b)
selenium
c)
silicon
d)
silver
19.
Which of the following elements is a transition metal?
a)
cesium
b)
copper
c)
tellurium
d)
tin
20.
Atomic size generally
a)
increases as you move from left to right across a period.
b)
decreases as you move from top to bottom within a group.
c)
remains constant within a period.
d)
decreases as you move from left to right across a period.
21.
What is the charge of a cation?
a)
a positive charge
b)
no charge
c)
a negative charge
d)
The charge depends on the size of the nucleus.
22.
The metals in Groups 1A, 2A, and 3A
a)
gain electrons when they form ions.
b)
all form ions with a negative charge.
c)
all have ions with a 1 charge.
d)
lose electrons when they form ions.
23.
In which of the following groups of ions are the charges all shown correctly?
a)
Li⁻¹, O⁻², S⁺²
b)
Ca⁺², Al⁺³, Br⁻¹
c)
K⁻², F⁻¹, Mg⁺²
d)
Na⁺¹, I⁻¹, Rb⁻¹
24.
What is the element with the highest electronegativity value?
a)
cesium
b)
helium
c)
calcium
d)
fluorine
25.
How many valence electrons are in an atom of phosphorus?
a)
2
b)
3
c)
4
d)
5
26.
How many valence electrons are in an atom of magnesium?
a)
2
b)
3
c)
4
d)
5
27.
How many valence electrons are in a silicon atom?
a)
2
b)
4
c)
6
d)
8
28.
What is the name given to the electrons in the highest occupied energy level of an atom?
a)
orbital electrons
b)
valence electrons
c)
anions
d)
cations
29.
What is the charge on the strontium ion?
a)
2–
b)
1–
c)
1+
d)
2+
30.
How many electrons does barium have to give up to achieve a noble-gas electron configuration?
a)
1
b)
2
c)
3
d)
4
31.
Which of the following diatomic molecules is joined by a double covalent bond?
a)
O₂
b)
N₂
c)
Cl₂
d)
He₂
32.
When Group 2A elements form ions, they:
a)
lose two protons.
b)
gain two protons.
c)
lose two electrons.
d)
gain two electrons.
33.
Which of the following shows correctly an ion pair and the ionic compound the two ions form?
a)
Sn⁺⁴, N⁻³; Sn₄N₃
b)
Cu⁺², O⁻²; Cu₂O₂
c)
Cr⁺³, I⁻¹; CrI
d)
Fe⁺³, O⁻²; Fe₂O₃
34.
Choose the answer that shows the correct number of protons, neutrons, and electrons IN THAT ORDER from the image below
a)
Protons 7 Electrons 7 Neutrons 7
b)
Protons 5 Electrons 7 Neutrons 5
c)
Protons 6 Electrons 7 Neutrons 7
d)
Protons 6 Electrons 6 Neutrons 7
35.
Which is the full electron configuration for a neutral atom of beryllium?
a)
1s2 2s2 2p6 3s2
b)
1s2 2s2
c)
1s2 2s3 2p5
d)
1s2 2s2 2p6 3s2 3p4
36.
Which group of elements in the periodic table is known as the alkali metals?
a)
Group 2 /Group 2A
b)
Group 1 /Group 1A
c)
Group 3 /Group 3A
d)
Group 5 / Group 5A
37.
Which answer shows the full electron configuration of oxygen?
a)
1S2 2S2 2P6 3S2 3P6
b)
1S2 2S2 2P4
c)
1S2 2S2 2P6
d)
1S2 2S2 2P6 3S2
38.
What is the correct formula for the compound Barium Oxide?
a)
BO
b)
BaO
c)
BrF
d)
Bromate
e)
16 B x O
39.
Choose the correct the formula for the compound Rubidium Phosphide.
a)
Rb3P
b)
Ru3P3
c)
Ru1P3
d)
Ru3(PO4)
40.
Which best describes the difference between an element and a compound?
a)
any substance that cannot be decomposed into simpler substances and a compound is two or more of those chemically combined
b)
compounds is anything cant be separate, element is 8 compounds together.
c)
Elements are fire earth water and air, compounds are when you put air with wind to make a volcano
d)
Elements are aspects of things and compounds are two aspects together
41.
Which of the following is NOT a sign of a chemical change involved in cooking.
a)
bubbles form as ingredients combine
b)
color changes as a cake bakes
c)
chocolate melts
d)
eggs change in composition as they cook
42.
Which best explains the difference between chemical properties and physical properties?
a)
Physical change is when a change occurs but the elements are the same ( ice and water). Chemical change is when new products are produced from the reaction. (Combustion)
b)
Chemical change is when a change occurs but the elements are the same ( ice and water). Physical change is when new products are produced from the reaction. (Combustion)
43.
In what way are two isotopes of the same element different?
a)
They have different numbers of protons and electrons
b)
They have different atomic numbers
c)
They have different states of matter
d)
They have different numbers of neutrons
44.
Which explains why isotopes of the same element have the same chemical behavior?
a)
They have different numbers of protons
b)
They have the same atomic mass
c)
They have the same atomic number
d)
They have the same state of matter
45.
Which best describes the trends in the atomic size of elements within groups and across periods in the periodic table?
a)
It increases from left to right and decreases from top to bottom
b)
It increases from left to right and increases from top to bottom
c)
It decreases from left to right and decreases from top to bottom
d)
It decreases from left to right and increases from top to bottom
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