Mass is used to measure the weight of an object. For example, you are measuring the mass of your body when you step on to a scale. In the metric system of measurement, the most common units of mass are the gram and kilogram.
Basically Gram & Kilograms
(a) The molecular shapes of cis and Trans forms of N2F2 are-
b) There is EN difference between N atom and F atom. Hence the molecule will have a bond dipole.
In Cis form two fluorine atoms are on the same side of N N bond. Hence, bond moment in N2F2 cis form) do not cancel each other. Thus the cis form is polar.
In the trans form two fluorine atoms are on the opposite side of N-N bond. Bond moment of NF cancels each other.
Thus: trans N2F2 is non polar molecule.
Waste materials, mining and transportation of radioactive fuels, radiation emissions from nuclear sites
Answer: argon (Ar)
Ar, Z=18 => 1s2 2s2 2p6 3s2 3p6
The 3 level shell has 8 electrons. The element with one more electron, need to start a new shell to arrange for the last electron.
Argon is a noble gas. Its group in the periodic table is 18. All the noble gases have the last shell full, which conferes them a high stability and low reactivity.
I think it’s D the melting point everything else doesn’t really make sense