Toggle navigation
التسجيل
تسجيل الدخول
الرئيسية
»
الاختبارات
»
الترم الأول
»
first term - first unit test - 2nd prep
first term - first unit test - 2nd prep
نسخ
تكرار
1
The number of elements in Mendeleev's periodic table is.......... elements.
118
76
92
67
2
They are the elements, which have the properties of both metals and nonmetals.
No correct answer
Nonmetals
Metalloids
Metals
3
The halogen, which can be prepared artificially is.........
chlorine.
iodine.
astatine.
bromine.
4
All the following diseases are caused by biological pollution except.......... disease.
bilharzia
typhoid
hepatitis
cancer
5
The element, whose atomic number is (17) is similar in its chemical construction to the element whose atomic number is ...........
9
7
2
19
6
All of the following metals react with water except........
Na
Cu
Mg
K
7
The boiling point of liquefied nitrogen is..........
196⁰
-96⁰
0⁰
-196⁰
8
The pure water boils at.......... °C.
0
50
20
100
9
Elements of the same period in the modern periodic table have the same..........
number of protons.
number of neutrons.
number of energy levels.
number of electrons in the outer levels.
10
In periods, by increasing the atomic number, the.........
no correct answer.
atomic radius increases.
atomic size decreases.
atomic size increases.
11
........... form positive ions during the chemical reactions.
Alkali metals
Nobel gases
Halogens
Nonmetals
12
The electrolysis of acidified water gives hydrogen gas and oxygen gas at a ratio of........... by volume.
2:3
1:2
1:3
2:1
13
The atomic number of an element that exists in group (7A) and period (2) is.........
9
12
17
7
14
It is the ability of the atom in covalent molecule to attract the electrons of the chemical bond towards itself.
Electrogravity
Positive ion
Electronegativity
Negative ion
15
Arsenic increases the infection rate by.........
liver cancer.
typhoid.
hepatitis.
brain cancer.
16
Mendeleev classified the elements of each group into......... sub-groups.
4
2
5
3
17
Each period in the periodic table starts with.........
nonmetal.
metalloid.
inert gas.
metal.
18
............. is considered from halogens.
Sodium
Chlorine
Calcium
Helium
19
Which of the following behaviours causes radiant pollution ?..........
Leakage of radioactive materials from nuclear reactor.
No correct answer
Discharging of sewage in seas.
Using water in cooling the nuclear reactors.
20
The number of elements which exist in nature is..........
92
102
29
118
21
The elements, which occupy the middle block (d) in the periodic table are called.......... elements.
alkaline earth
alkali
transition
noble
22
By increasing the atomic number within group (1A), the .........
nonmetallic property increases.
all the previous answers.
metallic property increases.
atomic size decreases.
23
The halogen which exists in a liquid state is..........
fluorine.
bromine.
chlorine.
iodine.
24
All the following are natural water pollutants except..........
volcanic eruptions.
death of living organisms.
lightning accompanying thunder storms.
discharge of factories residues.
25
If the atomic number of an element is 15, so its group is located in...... block
d
s
f
p
26
They are the elements, which have less than four electrons in their outermost energy levels.
Nonmetals
No correct answer
Metals
Metalloids
27
The metallic property of alkali metals increases by increasing their.........
electronegativity.
valency.
all are correct.
atomic size.
28
A bottle is filled completely with water and put closed in the freezer. After sometime it breaks, because when water freezes............
its density becomes less than its volume.
its density increases and its volume decreases.
its volume increases and its density decreases.
its volume increases without a change in the density.
29
The modern periodic table consists of......... vertical groups.
7
10
18
14
30
Hydrogen element belongs to..........
group (2A).
group (1A).
group (7A).
group (6A).
31
All the following are among the properties of water except............
its volume increases by freezing.
it decomposes by heat into its elements.
it is a polar compound.
it has neutral effect on litmus paper.
32
The scientist, who discovered that the nucleus of atom contains positively charged protons is.........
Moseley.
Mendeleev.
Rutherford.
Bohr.
33
It is an atom of nonmetallic element which gained an electron or more during the chemical reaction.
Positive ion
Electrogravity
Negative ion
Electronegativity
34
Alkali metals are considered from........... block groups.
S
P
D
F
35
In a water molecule, oxygen atom combines with two hydrogen atoms by two bonds.
single covalent
double covalent
hydrogen
ionic
36
The number of energy levels in the heaviest known atom is .......... levels.
8
5
7
10
37
The 3rd period starts with elements whose oxides are as the following........
acidic, amphoteric, then basic.
basic, acidic, then amphoteric.
basic, amphoteric. then acidic.
acidic, basic, then amphoteric.
38
All of the following are from the properties of alkali metals except they.......
are active elements.
conduct heat and electricity.
have low densities.
are divalent elements.
39
Most alkali metals have........ density.
equal
low
higher
zero
40
There are.......... bonds among the water molecules.
metallic
covalent
hydrogen
ionic
41
Noble gases are located in group............
5A
2A
7A
1A
42
......... is the least metallic element in group (1A).
Cs
Li
K
Na
43
The outermost energy level of any halogen contains......... electrons.
7
2
8
9
44
Water can dissolve.........
oil.
table salt and sugar.
table salt.
sugar.
45
The snow crystal has.......... shape
pentagonal
hexagonal
octagonal
quadrilateral
46
The scientist who left vacancies in his table to be filled with suitable discovered elements in future is.........
Rutherford.
Bohr.
Moseley.
Mendeleev.
47
They are the elements, which have more than four electrons in their outermost energy levels.
Nonmetals
Metalloids
No correct answer
Metals
48
Halogens are considered from........block groups.
P
D
S
F
49
Increasing the concentration of ........... in drinking water causes blindness.
chlorine
lead
arsenic
mercury
50
Liquid sodium is used in.........
computers.
fridges.
nuclear reactors.
sterilization.
×
بلاغ عن خطأ
مقدم البلاغ
طالب
معلم
السؤال
تفاصيل الخطأ
إرسال
إلغاء
×
مشاركة
#
#
نسخ
نسخ الرابط