def Cr(mw_atmos, mh=1):
    """Defines properties for Cr as condensible"""
    gas_mw = 51.996
    if mh == 1:
        gas_mmr = 8.8e-07 * (gas_mw / mw_atmos)
    elif mh == 10:
        gas_mmr = 8.6803e-06 * (gas_mw / mw_atmos)
    elif mh == 50:
        gas_mmr = 4.1308e-05 * (gas_mw / mw_atmos)
    else:
        raise Exception(
            'Chromium (Cr) gas properties are only available for 1, 10, and 50xSolar'
            )
    rho_p = 7.15
    return gas_mw, gas_mmr, rho_p
