Question

7 multiple choice 1 point which of the following describes the properties of noble gases? they are solid at room temperature. they are highly reactive. they are generally unreactive. they have high boiling points. 8 multiple choice 1 point which element has the ground state electronic configuration, 1s²2s²2p⁶3s²3p⁶4s¹? potassium bromine phosphorous calcium

Explanation:

• Noble gases have full valence electron shells, making them generally unreactive. They are gases at room temperature (not solids) and have low boiling points.
• For the electron configuration \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}\), we count the total number of electrons. \(2 + 2+6 + 2+6 + 1=19\). Potassium (\(K\)) has an atomic number of \(19\), so it has \(19\) electrons. Bromine (\(Br\)) has \(35\) electrons, phosphorus (\(P\)) has \(15\) electrons, and calcium (\(Ca\)) has \(20\) electrons.

Answer:

1. They are generally unreactive.
2. potassium