Atomic structure and periodicity

Question 1 of 10

The electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵ belongs to

Question 2 of 10

Which sub-level is filled after 3p?

Question 3 of 10

The halogens are found in Group

Question 4 of 10

The electron configuration of sodium (Z = 11) is

Question 5 of 10

Across a period from left to right, atomic radius generally

Question 6 of 10

Which of the following elements is an alkali metal?

Question 7 of 10

How many electrons can the second shell hold?

Question 8 of 10

The element with configuration 1s² 2s² 2p⁶ 3s² is in

Question 9 of 10

Which has the largest ionic radius?

Question 10 of 10

The number of neutrons in ²³Na (atomic number 11) is