Download First Term Science Al-Karma Language School Prep 2 Question (1

First Term
Al-Karma Language School
Science
Prep 2
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Question (1):
Complete the following statements:
1)-The scientist who discovered the presence of protons in the
nucleus is ---------------.
2)-All alkali metals are good conductors of --------- and --------.
3)-In groups (17), the electro negativity of chlorine (17Cl) is ------ than
that of bromine
(35Br).
4)-Elements of group (1A) are known as --------, while elements of
group (17) are called ----------.
5)-The modern periodic table consists of -------- periods and -----groups.
6)-Metals react with oxygen giving ------- which is known as ------.
7)- ---------- is used in food preservation as it emits -------- rays
which prevents reproduction of microbial cells.
8)- In 1913, the new Zealand scientist ------- discovered that the
nucleus of the atom contains ---------.
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First Term
Al-Karma Language School
Science
Prep 2
9)-Mendeleev arranged the elements ascending according to ---------,
while Moseley arranged them ascending according to ---------.
10)- -------- and ---------- elements are examples of alkaline earth
metals.
11)-The valency energy level of halogen contains -------- electrons,
while that of alkaline earth metal has --------- electrons.
12)-Sodium and potassium are kept under the surface of --------- to
prevent them from the reaction with ----------.
13)-Each period in the modern periodic table starts with ------- and
ends with ---------.
14)-The positive ion carries a number of ---------- charges equals to
the number -------- electrons.
15)-An element whose electronic configuration is (2,8) so, it exists in
group ------- and period -------- in the modern periodic table.
16)-The new number of group (5A) is ---------, while that of zero
group is ---------.
17)- --------- have properties of metals and non metals and ------- is
one example of them.
18)-Pure water boils at -------- and freezes at --------.
19)-The high -------- heat of water makes it able to resist the change
from a state to another, while the high --------heat of water makes it
able to absorb or lose large amount of heat without changing its
temperature.
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First Term
Al-Karma Language School
Science
Prep 2
Question (2):
Write the scientific term:
1)-The group of elements that have higher densities than alkali metals
densities.
(---------------)
2)-The part from million million part of a meter.
(---------------)
3)-An element that gains electrons during chemical reactions.
(---------------)
4)-Oxides produced from the reaction of metals with oxygen.
(---------------)
5)-The arrangement of metals in descending order according to their
chemical activities.
(---------------)
6)-The ability of the atom in covalent molecule to attract the electrons
of the chemical bond to itself.
(---------------)
7)-The number of protons inside the nucleus.
(---------------)
8)-The non metal element which is used in preservation of the cornea of
the eye.
(---------------)
9)-Metalloid which is used in the manufacture of electronics.
(---------------)
10)-Metals of d- block elements which start at period four of the
modern periodic table.
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(---------------)
First Term
Al-Karma Language School
11)- Elements of group 18.
Science
Prep 2
(---------------)
12)-The group which is located on the right side of the periodic table
before zero group.
(---------------)
13)-The table in which elements are classified in an ascending order
according to their atomic number and the way of filling energy levels with
electrons.
(---------------)
14)-Non metallic atom that gains electron or more during chemical
reactions.
(---------------)
15)-The gas evolved on adding dilute hydrochloric acid to magnesium
strip.
(---------------)
16)-The halogen which exists in liquid state.
(---------------)
17)-A molecule consists of two hydrogen atoms and one oxygen atom.
(---------------)
18)-Compounds, most of them dissolve in water.
(---------------)
19)-The bond which binds oxygen atom with hydrogen atom in water
molecule.
(---------------)
20)-The kind of bond which binds water molecule together.
(---------------)
21)-The shape of ice crystals.
(---------------)
22)-The positive ions which are produced from water ionization.
(---------------)
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First Term
Al-Karma Language School
Science
Prep 2
Question (3):
Give reasons for:
1)- Liquified nitrogen is used in preservation of cornea of the eye.
--------------------------------------------------------------------------------------------------------------.
2)-Sodium ion (Na +) and fluoride ion (F-) have the same electronic
configuration.
--------------------------------------------------------------------------------------------------------------.
3)-Elements of group (1A) are known as alkali metals.
--------------------------------------------------------------------------------------------------------------.
4)-Water is more polar than ammonia.
--------------------------------------------------------------------------------------------------------------.
5)-Mendeleev had to put more than one element in one cell.
--------------------------------------------------------------------------------------------------------------.
6)-The atomic size of elements in the same period decreases as their
atomic numbers increases.
-------------------------------------------------------------------------------------------------------------.
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First Term
Al-Karma Language School
Science
Prep 2
7)-Sodium fires don't put off with water.
--------------------------------------------------------------------------------------------------------------.
8)-Cobalt 60 is used in preservation of food.
--------------------------------------------------------------------------------------------------------------.
9)-Silicon slides are used in the manufacture of electronics.
--------------------------------------------------------------------------------------------------------------.
10)-Mendeleev left gaps in his periodic table.
--------------------------------------------------------------------------------------------------------------.
11)-Group (17) elements are known as halogens.
--------------------------------------------------------------------------------------------------------------.
12)-Alkali metals are monovalent elements.
--------------------------------------------------------------------------------------------------------------.
13)-Cesium (Cs) is the most metallic element.
--------------------------------------------------------------------------------------------------------------.
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First Term
Al-Karma Language School
Science
Prep 2
Question (4):
Choose the correct answer:
1)-Transition elements appear starting from period --------.
(2-3-4-5)
2)-Burning carbon in air produces -----------.
(CO- C02 –CuO- HCl)
3)-The molecule of halogen is composed of -------- atoms.
(2- 1 - 3 – 4)
4)-The number of elements in Mendeleev's table is ---------.
(92- 116 – 76 – 67)
5)-During chemical reaction of halogens, they -------- electrons.
(gain one – lose one – gain two – share one)
6)-The atomic number of the elements which lies in period (4) and
group (2A) is ----------.
(4 – 18 – 12 – 20)
7)-The liquified nitrogen is used in preservation of cornea of the eye
because ------------.
(it has high boiling point – it has high freezing point – it has low
freezing point – it has low boiling point)
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First Term
Al-Karma Language School
Science
Prep 2
Question (5):
A)-Mention one use or importance for each of the following:
1)-Liquid sodium.
-------------------------------------------------------.
2)-Liquid nitrogen.
------------------------------------------------------.
B)-Locate the following elements in the modern periodic table:
1)-11Na
2)-3Li
3)-17Cl
4)-1H
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First Term
Al-Karma Language School
Science
Prep 2
C)-Correct the underlined words:
1)-The electro negativity of elements increase in the group by
increasing their atomic number.
-------------------------------------------------------.
2)-The density of potassium is larger than the density of calcium.
-------------------------------------------------------.
3)-Water has low latent heat and specific heat.
------------------------------------------------------.
4)-The density of water (liquid) less than the density of ice(solid).
------------------------------------------------------.
D)-The opposite figure shows a set of the periodic table:
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First Term
Al-Karma Language School
Science
Prep 2
1)-What is the name of the shaded group?
-------------------------------------------------------.
2)-What is its block?
-------------------------------------------------------.
3)-State the physical sate of their elements?
-------------------------------------------------------.
4)-What is the new number of this group in the modern periodic table?
--------------------------------------------------------.
Question (6)
A)-What is the atomic number of each of the following elements:
1)- Element (X) which lies at period (2) and group (3A).
------------------------------------------------------.
2)- Element (Y) which lies at period (3) and group (5).
------------------------------------------------------.
B)-Write the chemical equation that illustrate:
1)- Reaction of carbon dioxide with water.
-------------------------------------------------------.
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First Term
Al-Karma Language School
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Prep 2
2)-Reaction of magnesium with dilute hydrochloric acid.
-------------------------------------------------------.
3)-Reaction copper with oxygen.
-------------------------------------------------------.
4)-Reaction chlorine with potassium bromide.
------------------------------------------------------.
5)-Reaction bromine with potassium iodide.
------------------------------------------------------.
6)-Reaction potassium with bromine.
------------------------------------------------------.
C)-Show by chemical equations the effect of water on:
1)-Sodium.
-------------------------------------------------------.
2)-Carbon dioxide.
------------------------------------------------------.
3)-Magnesium oxide.
-----------------------------------------------------.
4)-Copper.
-----------------------------------------------------.
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First Term
Al-Karma Language School
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Science
Prep 2