Anúncios
1
There are how many elements in the periodic table?
145
120
83
118
2
How many of them are natural and how many are artificial?
92 elements are natural and 26 elements are artificial.
100 elements are natural and 18 elements are artificial.
50 elements are natural and 20 are artificial.
80 elements are natural and 38 elements are artificial.
3
What is the Uranium family in the periodic table?
Actinides
Noble Gases
Alkali Metals
4
What is the main function of the periodic table?
Enumerate elements according to their atomic mass
Classify elements based on their chemical properties
Organize elements in alphabetical order
Determine the abundance of elements in the Earth's crust
5
In what year was the periodic table initially proposed?
1869
1945
1897
1912
6
Which of these elements belongs to the alkali metals group?
Phosphorus
Sulfur
Chlorine
Sodium
7
What is the chemical symbol for carbon?
Cu
Ca
Co
C
8
Which noble gas is known for its use in lighting and advertising signs?
Argon
Krypton
Neon
Helium
9
What is the chemical symbol for gold?
Au
Ag
Fe
Pb
10
Which element is a halogen commonly used in water purification?
Chlorine
Bromine
Iodine
Fluorine
