aleksiandr999

17.05.2021 01:33 •  Химия

Question 1. / 30
Elements contain two or more type of particle
a)
false
b)
true
Question
2. / 30
Metallic and nonmetallic properties are related to the number of valence electrons and the radius of an atom
a)
True
b)
False
Question
3. / 30
Filtration is a method to separate two or more subtances. In filtration, a filter paper is placed in a funnel.
a)
True
b)
False
Question
4. / 30
Salts, acids, bases, and oxides are all different classes of compounds.
a)
True
b)
False
Question
5. / 30
Which one the following is not properties of element
a)
Elements show by the formula
b)
An element cannot be broken down into another substance.
c)
When elements react with each other, they produce compounds
d)
The basic building blocks of elements are atoms.
Question
6. / 30
Proton (p) : Uncharged charged particles found in the nucleus of an atom.
a)
False
b)
True
Question
7. / 30
Chemistry simply can be defined as the study of mater and its changes
a)
True
b)
False
Question
8. / 30
Liquids which do not mix with each other are called immiscible liquids, such as olive oil and water.
a)
True
b)
False
Question
9. / 30
It is impossible to separate a mixture of liquids that have different melting points.
a)
False
b)
True
Question
10. / 30
Liquids which mix with each other in any ratio are called miscible liquids such as water and ethyl alcohol.
a)
False
b)
Ture
Question
11. / 30
Which one the following is compounds
a)
H2O
b)
Au
c)
Fe
d)
O
Question
12. / 30
Chemical properties can be organized as intensive and extensive
a)
False
b)
True
Question
13. / 30
The most common states are: solid, liquid and gaseous
a)
False
b)
True
Question
14. / 30
An atom’s nucleus contains protons and neutrons.
a)
True
b)
False
Question
15. / 30
Liquids have no definite volume and no definite shape.
a)
False
b)
True
Question
16. / 30
Flammability, aciditiy, basicity, and reactivity with water are some examples of chemical properties.
a)
False
b)
True
Question
17. / 30
All elements are shown by the use of symbols
a)
False
b)
True
Question
18. / 30

a)
A
b)
B
c)
C
d)
D
e)
E
Question
19. / 30
Which one the following is element
a)
H2O
b)
CO2
c)
CH4
d)
Au
Question
20. / 30
Elements can be classified as metals and nonmetals
a)
False
b)
True
Question
21. / 30
When the chemical properties of a substance are altered, it means a chemical change (new substance formed) occurred.
a)
False
b)
True
Question
22. / 30
Atom is a term that originates from the Greek word atomos, which means divisible
a)
True
b)
False
Question
23. / 30
Isotopes can be defined as atoms that have the same number of protons but a different number of electrons
a)
True
b)
False
Question
24. / 30
Plasma is often called the fourth state of matter.
a)
False
b)
True
Question
25. / 30
Gases have no definite volume and no definite shape.
a)
False
b)
True
Question
26. / 30
Solid have definite volume, but no definite shape.
a)
True
b)
False
Question
27. / 30
Liquids have definite volume, but no definite shape.
a)
False
b)
True
Question
28. / 30
science of chemistry includes all substances in our life.
a)
False
b)
True
Question
29. / 30
Which of the following is not a element?
a)
C
b)
Fe
c)
Au
d)
H2O
Question
30. / 30
Atoms are accepted as indivisible because of their minute size.
a)
True
b)
False