Noble gases are inert elements and their properties are different from all the other elements. They are extremely non-reactive and they can occur in nature by themselves and don't need another element to stabilize them.
Noble gases are inert elements and their properties are different from all the other elements.
They are extremely non-reactive and they can occur in nature by themselves and don’t need another element to stabilize them.
1. Mendeléev observed that most of the elements got a place in a Periodic Table and were arranged in the order of their increasing atomic masses. 2. It was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.
1. Mendeléev observed that most of the elements got a place in a Periodic Table and were arranged in the order of their increasing atomic masses.
2. It was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.
Name the elements that separated the metals and non-metals in periodic table.
Metalloids
Metalloids
See lessFill in the blanks: Group 18 elements are called ______________
Noble gases
Noble gases
See lessFill in the blanks: The basis of modern Periodic table is _______________
Increasing atomic number.
Increasing atomic number.
See lessFill in the blanks: Group 17 elements are called ______________
Group 17 is known as Halogens.
Group 17 is known as Halogens.
See lessWhy do you think the noble gases are placed in a separate group?
Noble gases are inert elements and their properties are different from all the other elements. They are extremely non-reactive and they can occur in nature by themselves and don't need another element to stabilize them.
Noble gases are inert elements and their properties are different from all the other elements.
See lessThey are extremely non-reactive and they can occur in nature by themselves and don’t need another element to stabilize them.
What were the criteria used by Mendeleev in creating his Periodic Table?
1. Mendeléev observed that most of the elements got a place in a Periodic Table and were arranged in the order of their increasing atomic masses. 2. It was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.
1. Mendeléev observed that most of the elements got a place in a Periodic Table and were arranged in the order of their increasing atomic masses.
See less2. It was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
Scandium Germanium
Scandium
See lessGermanium
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K, C, AI, Si, Ba.
K₂O CO₂ Al₂O₃ SiO₂. BaO.
K₂O CO₂ Al₂O₃
See lessSiO₂.
BaO.
What were the limitations of Newlands’ Law of Octaves?
S K Patil answer is easy and best describe the question.
S K Patil answer is easy and best describe the question.
See lessDid Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
Yes, in second and third column of octave.
Yes, in second and third column of octave.
See less