True or False..For Science?

Question

T or F- The properties of the elements in a period are chemically very similar

T or F - Only relatively small amount of energy is required to move an electron

T or F - Moving from element to element on period two, an additional electron in the same energy level is added to each atom.
T or F - The reactivity of the metal elements generally increases as you move left to right across the periodic table.

Answer 1

False (elements in a group are similar)

True

True

False (reactivity decreases as you go left to right)

Answer 2

F. Elements in the same group (vertical column) have similar chemical properties. Periods are the horizontal rows.

T. Relative to moving a neutron or a proton in the nucleus.

T. All the electrons in the second period are in the second energy level.

T. As you move left to right, elements generally become more electronegative, and thus are more reactive. This excludes the noble gases on the far right.

Answer 3

you should do that on your own!