<u>Answer:</u> The chemical formula for aluminium nitrite is 
<u>Explanation:</u>
The given compound is formed by the combination of aluminium and nitrite ions. This is an ionic compound.
Aluminium is the 13th element of periodic table having electronic configuration of ![[Ne]3s^23p^1](https://tex.z-dn.net/?f=%5BNe%5D3s%5E23p%5E1)
.
To form 
ion, this element will loose 3 electrons.
Nitrite ion is a polyatomic ion having chemical formula of 
By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.
So, the chemical formula for aluminium nitrite is
Answer:
smallest mass necessary to
Explanation:
The critical mass for a fissionable material is the smallest and the lowest quantity of a particular fissile material required to generate a self-sustaining fission chain reaction under specified conditions. The size's features are determined by a number of variables. Examples include;
The type of fissile material employed, its purity as well as concentration, the shape of the surrounding reaction system e.t.c.
Bohr is the scientist who described the electrons as traveling in certain orbits or energy levels
These could all go either way, hardness and other special properties are what I'm guessing would be the most accurate in determining the kind of material.
luster, cleavage, streak, and color can all be affected by other factors. but I guess cleavage would also be accurate. so I guess hardness special properties and cleavage would be the most reliable.
