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