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WorksheetsСуурь боловсролын Байгалийн ухаан
Total questions: 21
Worksheet time: 16mins
Химийн урвалын дунд хий ялгарч байвал тэр урвалын хурдыг ямар аргаар хэмжих боломжтой вэ?
A. Урвалын холимгийн массын болон урвалаар ялгарсан хийн эзэлхүүний өөрчлөлтийг хэмжих
B. Урвалын холимгийн массын өөрчлөлтийг хэмжих
C. Урвалаас ялгарч буй хийн эзэлхүүний өөрчлөлтийг хэмжих
D. Урвалд орж байгаа бодисуудын идэвхтэй мөргөлдөлийн тоог хэмжих
Химийн лабораторид хэрэглэгддэг шил сав, багаж хэрэгслийг зориулалтаар нь харгалзуулна уу
A. 1Г, 2А, 3В, 4Б
B. 1В, 2А, 3Б, 4Г
C. 1Г, 2Б, 3А, 4В
Why do Li, Be, C, N belong to the 2nd period of the periodic table?
They have the same number of electrons in the outer shell
They have 2 electrons in the outer shell
The number of electrons in the shell is 2
They have 2 electrons in the 2nd shell
How many shells does a potassium atom have?
1
2
3
4
What is the number of protons, neutrons, and electrons in a hydrogen atom?
1, 1, 1
1, 2, 1
1, 1, 0
1, 1, 2
Atoms of the same element that differ in the number of neutrons are called isotopes.
Name the scientist who discovered the proton.
E. Rutherford
N. Bohr
J. Chadwick
J.J. Thomson
What common characteristic is observed in the atomic structure of alkali metals?
Same group number
Same number of valence electrons
Same number of atomic shells
Same number of protons
As you move down a group in the periodic table...
Atomic radius decreases
Metallic character increases
Non-metallic character decreases
Atomic radius increases
Choose the row that contains transition metals.
Mn, Cu, Fe
Li, Na, K
Rb, Cs, Fr
F, Cl, Br
Choose the true statement about inert gases.
The electron shell is fully filled, hence inactive in reactions
They constitute no less than 1% of the air composition
They are inactive in reactions, hence used in lamps and lighting
Only statement A is true
Determine the number of electrons in the electron shell of an atom represented by Si.
What is the number of electrons in the outer shell of the Si atom?
A. Only A information
B. Only B information
C. Both A and B information
D. A, B and C information
Which element from group VII is solid at room temperature?
A. Iodine
B. Bromine
C. Chlorine
D. Fluorine
What atom is represented in the image?
A. Hydrogen
B. Carbon
C. Oxygen
D. Boron
How does the chemical activity change as you go down group IA?
A. No pattern
B. Does not change
C. Decreases
D. Increases
At what state does fluorine exist at room temperature if its melting point is -220°C and boiling point is -188°C?
A. Gas
B. Solid
C. Liquid
D. None of these
Name a metalloid element.
A. Na
B. S
C. P
D. Si
Which indicator is used to identify the base formed when alkali metals react with water?
A. Methyl orange
B. Phenolphthalein
C. Litmus
D. Food coloring
How does the color of the solution change when bromine water is added to potassium iodide?
A. Red-brown
B. Orange
C. Yellow-green
D. Green
How does the color of the solution change when chlorine water is added to potassium bromide?
A. It will turn red-brown.
B. It will turn orange.
C. It will turn yellow-green.
D. It will be colorless.
