Show that the statement is true. If JK has endpoints J(−4, 1) and K(6, 3), and LN has endpoints L(0, 3) and N(2, 1) then JK and LN have the same midpoint.

increased stability in the completion of fluorine's outer shell.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.