Do elements in a compound lose their identities?
In a compound the (atoms/molecules) are (chemically physically) combined so that the elements that make up the compound (retain/lose) their identities and (do do not) take on a new set of properties. In a mixture, the substances (lose/retain) their identities.
Is K or Br atom bigger?
Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.
Which atom has the largest ionization energy?
helium
Is Na+ smaller than Mg2+?
Answer. Deduce which of Na+ and Mg2+ is thesmaller ion. mg2+ would be the smaller ion this isbecause each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus.
What is the size of Mg2+?
Metallic, Covalent and Ionic Radii(r)*
| Atom/Ion | r(pm) |
|---|---|
| Lu3+ | 86 |
| Mg | 160 |
| Mg2+ | 72 |
| Mn | 137 |
Which is smaller mg or Mg2+?
Answer. So Mg atom will be larger as it has more electrons than Mg 2+ and thus will have larger atomic radii.
Which is larger Fe2+ or Fe3+?
Fe2+ is greater in size than Fe3+. Consider the electronic configuration of Fe2+[Ar] 3d6 and Fe3+ [Ar]3d5 (For comparison, Fe [Ar] 4s2 3d6). Fe3+ ionic radius is 63 pm, while Fe2+ has an ionic radius of 77 pm. (For comparison, the Fe atom has a radius of 140 pm.)
Which is bigger Li or Mg2+?
Lithium is higher up in the periodic table than magnesium. Thus, it has a smaller atomic size, and therefore, a smaller ionic size. Also, Li2+ is better attracted by the nucleus since it has only 2 s-electrons, whereas Mg2+ has more e-e repulsions and is thus smaller.