اختبارات شاملة كويز (2)
Quiz by Dr. Mariam
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- Q1
A massspectrometer shows that a sample of terrestrial copper contains two isotopes: 63Cu(69.15%, atomic mass 62.9296) and 65 Cu (30.85% atomic mass64.9278). What is the atomic weight for this sample of copper?
65.22 amu
64.33 amu
64.00 amu
63.55 amu
120s - Q2
Carbon dioxide (CO2) is an example for ……..
Atoms
Compounds
Mixtures
Elements
120s - Q3
Which of the following is the largest unit?
Microgram
Milligram
Pictogram
120s - Q4
Different isotopes of the same element have the same………
Numbers of electrons
Radioactivity
Mass number
Numbers of neutrons
120s - Q5
The change from the liquid state to the gaseous state is called
Solidification
Sublimation
Condensation
Vaporization
120s - Q6
1 miga gram=………..gram
106
10-9
10-3
109
120s - Q7
There is no unit for ……..
Specific heat
Density
Volume
Specific gravity
120s - Q8
A solution of sand in water may be defined as a…………
Heterogeneous mixture
Heterogeneous compound
Homogeneous compound
Homogeneous mixture
120s - Q9
If the density of substance is 0.5 gram\cm3,This means that the mass of 100 cm3 of this substance should be………..
0.008 gram
80 grams
125 grams
50grams
120s - Q10
What is the standard SI unit for volume?
Cubic meter
Milliliter
Liter
Cubic centimeter
120s