WorksheetsGCHEMI Midterm Summative Test
Total questions: 60
Worksheet time: 3hrs 33mins
Name
Class
Date
1.
What does the group number of an element represent?
a)
number of valence electrons
b)
number of electrons
c)
number of protons
d)
number of orbits
2.
How many electrons can p orbitals carry?
a)
6
b)
2
c)
10
d)
14
3.
What is the electron configuration of Calcium?
a)
1s2 2s2 2p6 3s2 3p6 4s2
b)
1s2 2s2 2p6 3s2 3p6 4s1
c)
1s2 2s2 2p6 3s2 3p6 4s3
d)
1s2 2s2 2p6 3s2 3p6 4s4
4.
What is the electron configuration of Rubidium?
a)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
b)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
c)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
d)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p7
5.
Using the group number, how many valence electrons does Platinum have?
a)
10
b)
11
c)
12
d)
9
6.
Using the Periodic Table, compute the molar mass of baking soda (NaHCO_3).
a)
84.02 g/mol
b)
80.09 g/mol
c)
85.06 g/mol
d)
90.81 g/mol
7.
What is the molecular mass of ammonia (NH_3)?
a)
17.04 g/mol
b)
18.04 g/mol
c)
18.04 g/mol
d)
16.04 g/mol
8.
Which among the following elements has a molar mass of 197 g/mol?
a)
Gold
b)
Silver
c)
Zinc
d)
Tungsten
9.
What is the molecular mass of bleach (NaOCl)?
a)
74.45 g/mol
b)
75.45 g/mol
c)
73.45 g/mol
d)
76.45 g/mol
10.
What is the molecular mass of limestone (CaCO_3)?
a)
100.09 g/mol
b)
99.09 g/mol
c)
98.09 g/mol
d)
101.09 g/mol
11.
How many atoms are there in 25g of Calcium?
a)
3.75x10^23 atoms Ca
b)
2.45x10^23 atoms Ca
c)
3.75x10^24 atoms Ca
d)
2.45x10^24 atoms Ca
12.
In 0.75 mol of Aluminum, how many grams of Aluminum will be yielded?
a)
20.25g
b)
21.25g
c)
22.25g
d)
19.25g
13.
How many mole/s of Lithium have 6.02x10^23 atoms of Lithium?
a)
1
b)
2
c)
3
d)
4
14.
If there are 5.25x10^23 atoms of Lead, how many grams of Lead are there?
a)
180.70g
b)
181.70g
c)
180.90g
d)
181.90g
15.
How many moles of Boron are needed to yield 50g of it?
a)
4.63 mol
b)
5.63 mol
c)
4.70 mol
d)
5.70 mol
16.
What is the correct number of valence electrons of carbon?
a)
4
b)
2
c)
6
d)
5
17.
Which of the following elements is being used to determine the actual activity of the thyroid gland and to treat detected cancer cells?
a)
Iodine
b)
Sodium
c)
Potassium
d)
Chlorine
18.
How many neutrons does the element lithium have?
a)
4
b)
3
c)
7
d)
10
19.
If the monoatomic ion has only one atom, how many atoms does a polyatomic ion have?
a)
more than one atoms
b)
two atoms only
c)
three atoms only
d)
ten atoms
20.
What is the correct chemical formula of ammonium?
a)
NH4+
b)
NH4-
c)
NH3+
d)
NH3-
21.
What are the three main subatomic particles of an atom?
a)
Proton, electron and neutron
b)
Proton, nucleus and neutron
c)
Proton, neutron and ions
d)
Proton, electron and iron
22.
What do you call a substance made up of two or more different elements that are chemically combined?
a)
Compounds
b)
Atoms
c)
Mixtures
d)
Elements
23.
What do you call the subatomic particle that has a positive charge?
a)
Proton
b)
Electron
c)
Neutron
d)
Ion
24.
Which of the following elements does not belong to noble gases?
a)
As
b)
Ne
c)
Kr
d)
Ar
25.
Which of the following elements belongs to metalloids?
a)
As
b)
Ne
c)
Kr
d)
Ar
26.
A nurse is using hydrogen peroxide to clean the wounds of her patient. What is the molar mass of hydrogen peroxide?
a)
34 g/mol
b)
44 g/mol
c)
33 g/mol
d)
16 g/mol
27.
In arranging the periodic table, who is the proponent of the "Law of Triads"?
a)
Johann Wolfgang Dobereiner
b)
Alexander Beguyer de Chancourtois
c)
John Newlands
d)
Glen Seaborg
28.
What best describes metalloids?
a)
They have characteristics of both metals and non-metals
b)
They are all good conductor
c)
They are normally unreactive
d)
They are poor conductor
29.
Which of the following is an example of a polyatomic ion?
a)
NO2 -
b)
K+
c)
Na+
d)
Ca+
30.
PO1 Cardo is always drinking coffee before reporting to his duty to increase mental alertness. What chemical compounds does coffee have?
a)
Caffeine
b)
Propane
c)
Methane
d)
Calcium Carbonate
31.
A chemistry student is analyzing an element with an atomic number of 7 and an atomic weight of 14. What is the number of neutrons of this element?
a)
7
b)
14
c)
21
d)
28
32.
What is the common name of the chemical compound that is being used as an antiseptic on the skin to prevent infection?
a)
Agua Oxinada
b)
Hydrogen peroxide
c)
Acetone
d)
Aspirin
33.
Which of the following radioactive isotopes is used to treat cancer by destroying cancer cells with gamma rays?
a)
Cobalt - 60
b)
Iodine -131
c)
Gadolonium - 135
d)
Iodine -123
34.
Among the 8 families in the periodic table, which of the following groups is normally unreactive?
a)
Group 8
b)
Group 7
c)
Group 6
d)
Group 1
35.
Which of the following elements is the most abundant in the universe?
a)
Hydrogen
b)
Carbon
c)
Nitrogen
d)
Oxygen
36.
This law states that the atomic weight of the middle element is nearly equal to the atomic weight of the other two elements in the triad?
a)
Law of Triad
b)
Law of Octaves
c)
Perodic Law
d)
Octet Rule
37.
Which scientist arranged the elements in the periodic table according to the increasing atomic number?
a)
Henry Moseley
b)
Lothar Meyer
c)
John Newlands
d)
Glen Seaborg
38.
What group consists of very active metals and are good conductors of heat and electricity?
a)
Alkali Metals
b)
Alkaline Earth Metals
c)
Noble Gases
d)
Halogens
39.
Who is credited with developing the first periodic table?
a)
Dmitri Mendeleev
b)
John Newlands
c)
Alexander Beguyer de Chancourtois
d)
Lothar Meyer
40.
Which group of elements is located in the far right column of the periodic table?
a)
Noble Gases
b)
Halogens
c)
Alkali metals
d)
Boron Group
41.
Each element in the periodic table is assigned a number called the atomic number. This is equal to?
a)
The number of protons in each atom of that element.
b)
The number of neutrons in each atom of that element.
c)
The number of protons plus the number of electrons in each atom of that element
d)
The number of protons and neutrons in each atom of that element
42.
What element in group III (3) is a non-metal?
a)
Boron
b)
Aluminum
c)
Gallium
d)
Scandium
43.
Which one of the following elements is used in computer chips?
a)
Silicon
b)
Neon
c)
Chlorine
d)
Silver
44.
How many main groups are there in the Periodic Table?
a)
Eight
b)
Seven
c)
Eighteen
d)
Four
45.
What is the atomic number of the element named after Dmitri Mendeleev?
a)
101
b)
106
c)
103
d)
100
46.
What is the representative particle of ionic compounds?
a)
Formula unit
b)
Atom
c)
Molecule
d)
Ion
47.
How many particles are there in one mole of any kind of substance?
a)
6.022x10²³
b)
3.022x10²³
c)
6.022x10²⁴
d)
3.022x10²⁴
48.
Why is mole concept important?
a)
All of the above
b)
t is useful when converting between grams and atoms or molecules.
c)
It gives us convenient way to express large numbers
d)
It can be applied to any type of particle representative.
49.
Which of the following units is used in expressing the amount of substance in terms of number of particles?
a)
mole
b)
liter
c)
gram
d)
celcius
50.
The following are representative particles of matter: which of the among them represents a covalent compound?
a)
molecule
b)
ion
c)
atom
d)
formula unit
51.
Which of the following is an example of a molecular formula?
a)
C2H6
b)
C
c)
CH
d)
CO
52.
Which type of chemical formula shows the simplest whole-number ratio of atoms in a compound?
a)
Empirical formula
b)
Molecular formula
c)
Structural formula
53.
Which type of chemical formula shows the actual number and arrangement of atoms in a molecule?
a)
Structural formula
b)
Molecular formula
c)
Empirical formula
54.
Which of the following refers to the tabular arrangement of elements according to increasing atomic numbers?
a)
Periodic Table
b)
Electron Configuration
c)
Orbital Diagram
d)
Molecular Formula
55.
What do you call to the vertical columns of elements in the periodic table?
a)
Group
b)
Period
c)
Orbital
d)
Subshell
56.
Which of the following is NOT a major classification of elementsm
a)
Acid
b)
Metals
c)
Non metals
d)
Metalloids
57.
Which group of metals when reacts with water releases hydrogen gas?
a)
Alkali metals
b)
Alkaline Earth metals
c)
Transition elements
d)
Inner transition elements
58.
What is the correct electron configuration of element Calcium (Ca)?
a)
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
b)
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
c)
1s² 2s² 2p⁶ 3s² 3p⁶
d)
1s² 2s² 2p⁶ 3s²
59.
Which of the following sets of electron configuration resulted to an element belongs to noble gases?
a)
1s² 2s² 2p⁶
b)
1s² 2s² 2p⁶ 3s¹
c)
1s² 2s² 2p5
d)
1s² 2s² 2p⁴
60.
Which principle states that electrons should occupy first the orbitals with lower energy before those with higher energy?
a)
Aufbau principle
b)
Pauli exclusion principle
c)
Hund's Rule
d)
Octet Rule
100 %
