Answer: The transition metals make up the middle block of he periodic table
Shielding electrons are the electrons in the energy levels between the nucleus and the valence electrons. They are called "shielding" electrons because they "shield" the valence electrons from the force of attraction exerted by the positive charge in the nucleus. Hope this helps!!
It would definitely be hand lense
A sodium ion symbol is written as Na^+.
Volume is 60 and the area is 94 have a great day
