How many electrons in an atom could have these sets of quantum numbers? n=2, n=4 l=1, n=6 l=2 m_l=-1?

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

The clouds are grey and ground is wet. a quantitative b qualitative

One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.