Radon is a metal.

The ionization energy of rubidium is higher than the ionization energy for ________.

The number of electron levels (not sublevels) in a magnesium atom is ________.

The energy of a visible photon is higher than that of ________.

The bond in Cl2 is a(n) ________ bond.

The number of electromagnetic waves that travel past a certain point in a given time is the ________ of the radiation.

What is the classification for this unbalanced reaction?Fe(s) + HCl(aq) → FeCl3(aq) + H2(g)

In this reaction, carbon is oxidized. 2C(s) + O2(g) → 2CO(g)

Barium is less metallic than ________.

The number of electrons in an atom of barium is ________.