WorksheetsProfessional oriented foreign language
Total questions: 30
Worksheet time: 30mins
Chemical elements
The chemical symbol of copper:
Cu
Ag
Pb
Fe
The atomic number is the minimum element ...
argon
hydrogen
sodium
Helium
Specify the chemical symbol for calcium:
Cf
K
Cu
Ca
How many chemical elements were known before the discovery of the periodic law?
45
63
87
101
Which chemical element is named after the country?
Neptunium
Nobelium
Selenium
Indium
Atoms of elements № 83 and № 23?
V; Bi;
Na; Co;
Al; Xs;
Ca; Se
How many copper isotopes are in nature?
3
4
2
6
Mass number of calcium?
40
42
20
32
It is located in the 4th period, in the VII group, which element?
Cu
Br
As
Se
An element that has the sequence number 30?
Mg
Na
Zn
Fe
In an argon atom ... there is
10 protons
11 protons
17 protons
18 protons
Which of them is not a chemical element
oxygen
water
gold
hydrogen
An element that has the sequence number 12?
Mn
Ca
Mg
Na
What types of phosphorus are there?
2
3
4
5
Р=9; N=10this element?
Cf
Ca
P
F
P = 25; N=30; this element?
Mn
Ca
H
Br
In the atom of halogen elements number of external electrons?
2
7
4
9
Elements of the same group ... the quantity is the same
electronic layers
neutrons
protons
outler electrons
Maximum number of electrons on the second floor?
2
8
18
32
Symbol of the chemical element phosphorus?
P
F
Po
Ft
Specify the chemical element named after the moon:
Tellurium
Argon
Xenon
Selenium
Select an item named after the scientist:
Polonium
Tellurium
Curium
Selenium
Organic chemistry -.....learning science
hydrogen and carbon derivatives
derivatives of inorganic substances
hydrocarbons and their derivatives.
derivatives of phosphoric compounds
Aromatic hydrocarbons with a molecular weight of 134.
1,3,5-trimethylbenzene
1,2-dimethylbenzene
1,2-dimethyl-4-ethylbenzene
1,4-di methylbenzene
The process of converting rubber into rubber
Gasification
Hydrogenation
Hydration
Vulcanization
Alkane , which called " swamp gas"
Methane
Pentane
Bhutan
Propane
Alkanes in the complete combustion in air are formed by the following substances
carbon monoxide and dioxide
carbon dioxide and hydrogen
carbon monoxide and water
carbon dioxide and water
The total coefficients of the total propane combustion reaction equation are equal.
10
12
13
26
In which pair of hydrocarbons does each compound contain only one double bond per molecule?
C2H2 and C2H6
C2H2 and C3H6
C4H8 and C2H4
C6H6 and C7H8
The reaction CH2CH2 + H2 –> CH3CH3 is an example of
Substitution
Addition
Esterification
Fermentation
