1. the valence electrons in nitrogen experience the 2 charge of the nucleus through the shield of core electrons. 2. the shielding experienced by any one of the valence electrons resulting from the core electrons is nearly nearly 6+. 3. for the 2s electrons, the shielding from the other 2s electron is nearly zero. 4. for the 2p electrons, the shielding from the other 2s electron is slightly greater than 5+. 5. therefore, the effective nuclear charge would be 6+. 6. the effective nuclear charge felt by the 2s electrons would be greater than the effective nuclear charge felt by the 2p electrons.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i