Question

Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations 7 Write the formula of oxide of any of the aforesaid element.

Answer 1

Answer:

Hydrogen and Lithium E. Configuration is 1s^2

Answer 2

Dear Student,

# Group I elements -

• Lithium (Li)
• Sodium (Na)

# Electronic configurations -

• [Li] = 1s2 2s1
• [Na] = 1s2 2s2 2p6 3s1

# Similarity in electronic configuration -

• Last orbital of both Li and Na contains only one electron.
• Hence, all elements of gr. 1 have valence +1.

# Formula of oxides -

• Li => Li₂O
• Na => Na₂O

Thanks dear. Hope I was helpful..