12.34 is the answer I think
Techneutim(Tc) has 43 protons, 43 electrons and 54 neutrons.
Answer:
Density = 7.87 grams per mL
Explanation:
Density is given by the formula:
where
Z = effective number of atoms in one unit cell.
M = Molecular mass of the substance
a = edge length of unit cell
Na = Avogadro number = 6.022×10²³
In this case:
Z=2 as it is body-centered type unit cell
M = 56 g per mole for iron
a = 287 pm =
Substituting the above values in the density formula we get:
Density of iron is 7.87 grams per mL.
Answer:
3
Explanation:
Atomic number refers to the number of protons in the nucleus of the atom.
and since there are 3 protons, the atomic number is 3
The other name for a condensation reaction would be dehydration reaction. This reaction happens when two molecules or compounds react forming a larger molecule and a small H2O molecule. From the name itself, water should be produced.