CHEM Test 2 (12th) 21-22

What is the electronic configuration of H₁ ?

• 1s²

• 1s¹

• 2s¹

We can calculate the quantum numbers of

• only the most external electron

• only the most internal electron

• any electron in the atom

What is the electronic configuration of Li₃ ?

• 1s² 2s¹

• 1s¹ 2s²

• 1s¹ 2s²

If we have the quantum number l=1, the the electron is located in a:

• "s" orbital

• "d" orbital

• "p" orbital

If we have the quantum number n=5, the the electron is located in the:

• third period

• fifth period

• first period

If we have the quantum number m_s= -1/2, the the electron orientation is:

• upwards

• downwards

• horizontal

What is the element whose last electon's quantum numbers are n=2, l=1, m_l=0, m_s=+1/2 ?

• carbon

• nitrogen

• oxygen

If the depiction of the last orbital is 3p⁴ it means

• 4 electrons in the "p" orbital in the 3rd period

• 3 electrons in the "p" orbital in the 4th period

• 3 electrons in the "p" orbital in the 3th period

If the last orbital of an element is 3s¹, then its quantum numbers are

• n=2, l=0, m_l=1, m_s=+1/2

• n=3, l=0, m_l=1, m_s=+1/2

• n=3, l=0, m_l=0, m_s=+1/2

Explain the quantum number m_l