A. Atomic Radius: the distance from the center of the nucleus to the outer most electrons in an atom Inc/dec as you move across a row (left to right) on the periodic table

Inc/dec as you move down a family (top to bottom) on the periodic table

B Ionic Radius: the distance from the center of the nucleus to the outer most electrons in an ion

Cations: loses/gains outer electrons, are _smaller/larger than the atom it forms from

Anions: loses/gains electrons, are _ smaller/larger than the atom it forms from

1. Which atom in each pair has the LARGER atomic radius? Write the symbol

a. Li or K e. Cl or Br

b. Ca or Ni f. Be or Ba

c. Ga or B g. Si or S

d. O or C h. Fe or Au

2. Rank each of the following in order of INCREASING atomic radius

a. F, K, Br <<
b. Os, Ni, Fe <<

3. Rank each of the following in order of DECREASING atomic radius

a. Cl, Br, Ga >>
b. Ca, Rb, C >>

4. Which ion in each pair has the SMALLER atomic radius?

a. K+ or O2- d. K+ or Cs+

b. Ba2+ or I- e. F- or S2-

c. Al3+ or P3- g. Fe2+ or Fe3+

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

answerspecific gravity;

intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.