Ch 5

The scientist who is credited with developing the first periodic table of elements is:

• a. Mendeleev

• b. Moseley

• c. Newlands

• d. Aufbau

In the periodic table of elements, the periods are the:

• a. horizontal rows

• b. vertical columns

• c. families

• d. groups

If the THIRD ionization energy for an element is substantially larger than its first and second, what element might you predict it to be?

• a. sodium

• b. calcium

• c. oxygen

• d. aluminum

How many elements are in the first period of the periodic table?

• a. 2

• b. 7

• c. 8

• d. 18

What are the names of the elements which are commonly found in the Earth's crust, belong to group 2, are hard, metallic, and form cations with a +2 charge?

• a. alkali metals

• b. alkaline earth metals

• c. halogens

• d. lanthanides

Which of the following is a Group B element also called transition metals?

• a. sodium

• b. zinc

• c. magnesium

• d. astatine

A vertical column in the periodic table is known as a(n):

• a. period

• b. row

• c. group

• d. orbital

How many valence electrons does the element oxygen contain?

• a. 8

• b. 6

• c. 2

• d. 16

Identify the period and group name of the element that has the ending-electron configuration 5s24d105p5.

• a. period 4, transition metals

• b. period 5, nitrogen group

• c. period 5, alkaline earth metals

• d. period 5, halogens

• e. period 4, noble gas

The most reactive metal group is (think of what would have the lowest ionization energy):

• a. the alkali metals

• b. the alkaline earth metals

• c. the transition metals

• d. the inner transition metals