Electron Configuration and Periodic Table

The video tutorial explains how to determine the element on the periodic table with the electron configuration 1s2 2s2. It presents two methods: counting the electrons to find the atomic number and using the periodic table's orbital blocks. Both methods lead to identifying beryllium as the element with this configuration. The video concludes by confirming the result and thanking viewers.

What is the electron configuration given in the video?

• 1s2 2s2

• 1s1 2s2

• 1s2 2p2

• 1s2 2s1

How many electrons are present in the configuration 1s2 2s2?

• 8

• 2

• 6

• 4

Which element has an atomic number of 4?

• Helium

• Lithium

• Boron

• Beryllium

What is the maximum number of electrons that the 's' orbital can hold?

• 4

• 2

• 1

• 6

Which block of the periodic table can hold up to 10 electrons?

• s block

• d block

• f block

• p block

In which period do you find the element with the configuration ending in 2s2?

• Fourth period

• Third period

• Second period

• First period

Which element is confirmed to have the electron configuration 1s2 2s2?

• Carbon

• Oxygen

• Nitrogen

• Beryllium