Eka-aluminium was later named as the metal __________ in the modern periodic table.
Gallium
Dmitri Mendeleev used the prefix "eka" to label elements he predicted would fill gaps in his periodic table, each sitting one row below a known analogue. Eka-aluminium occupied the slot directly below aluminium in Group 13. The element discovered by Paul-Émile Lecoq de Boisbaudran in 1875, matching Mendeleev's predicted mass and density for that slot, is Gallium. (Eka-boron corresponds to Scandium, and Eka-silicon corresponds to Germanium.)
Hence, Gallium.
Similar Questions
Which statement best identifies a metalloid based on its properties?
The element with atomic number 57 belongs to:
Among H, Li, O and F, ____ element has the largest atom and ____ the smallest atom.
On moving from sodium to chlorine across a period, the atomic size ________.
Which of the following elements has the highest ionisation energy?
Which of the following elements is more electronegative?
When elements are arranged in the order of increasing atomic masses, the properties of the first element is similar to those of the eighth element like with musical notes' — this law is known as:
_______ are electropositive in nature.
In the modern periodic table, _______ is the last metalloid.
Which of the following is not the electronic configuration of a non-metal?
Important Questions from Classification of Elements and Periodicity in Properties
- Which one of the following statements about alkaline earth metals is NOT true ?
- What element is a greenish yellow gas with a characteristic smell at room temperature?
- In the periodic table, as one goes down the group, which property doesn't change?
- Which of the following is a copper ore?
- Which scientist invented the Periodic table?
