Question 1

1- 
There are ............ bonds between water molecules.

Accepted Answer

d. hydrogen

Answer

b. ionic

Answer

c. covalent

Answer

a. metallic

Question 2

2-
 An element, its atomic number is 19, so the electronic configuration of its ion is ...........

Accepted Answer

a. (2 , 8 , 8)

Answer

b. (2 , 8 , 8 , 1)

Answer

c. (2 , 8 , 9)

Answer

d. (2 , 8 , 8 , 19)

Question 3

3-
....... fossils indicate that the environment where they lived was hot, rainy and tropical area.

Accepted Answer

b. Ferns

Answer

c. Nummulites

Answer

a. Coral

Answer

d. Snails

Question 4

4- 
 When alkali metal reacts with water, ............ gas evolves.

Accepted Answer

a. H₂

Answer

d. CO₂

Answer

c. N₂

Answer

b. O₂

Question 5

2-
What is the atomic number of the element that follows it in the same period?

Accepted Answer

18

Answer

25

Answer

9

Answer

16

Question 6

(3)- What is its physical state?

Accepted Answer

gas

Answer

liquid

Answer

Solid

Question 7

4-
This element belongs to a main group in the periodic table called ........ .

Accepted Answer

Halogens

Answer

Alakli metals

Answer

Noble gases

Question 8

5-
This element can replace ....... elements in their salt solutions.

Accepted Answer

Bromine and Iodine

Answer

Bromine only

Answer

Iodine only

Answer

Florine

Question 9

Question 4: True or False ?
1-
 Acidic oxides are formed by the reaction of nonmetals with oxygen.

Accepted Answer

True

Answer

False

Question 10

2-
During the water electrolysis by Hofmann's voltmeter, oxygen gas evolves at the negative cathode.

Accepted Answer

False

Answer

True

Question 11

3- 
The Ionosphere is surrounded by two magnetic belts known as Van- Allen belts.

Accepted Answer

True

Answer

False

Question 12

4- 
Temperature decreases by 6 °C degrees at 1 km above the sea level.

Accepted Answer

False

Answer

True

Question 13

5- 
The global warming phenomenon is caused by the greenhouse effect.

Accepted Answer

True

Answer

False

Question 14

6-
Amber is an example of a cast fossil.

Accepted Answer

False

Answer

True

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