Post test Data Report

Which element has the largest atomic radius?

• As

• N

• P

• Sb

Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

• The number of orbitals decreases.

• The number of neutrons decreases.

• Electrons get closer to the nucleus.

• Electrons get farther from the nucleus.

When electrons are removed from the outermost shell of a calcium atom, the atom becomes

• an anion that has a larger radius than the atom.

• an anion that has a smaller radius than the atom.

• a cation that has a larger radius than the atom.

• a cation that has a smaller radius than the atom.

Among the elements of the main group, the general trend in the first ionization energy moving across a period is not followed between group 2 and group 13.

Which best explains these exceptions?

• The ionization energy decreases because the full s orbital shields the electron entering the p orbital.

• The ionization energy increases because the full s orbital shields the electron entering the p orbital.

• The ionization energy decreases because the stability of the half-full p subshell is increased.

• The ionization energy increases because the stability of the half-full p subshell is increased.

Which statement best describes how electrons fill orbitals in the periodic table?

• Electrons fill orbitals in order of their increasing energy from left to right.

• Electrons fill orbitals in order of their increasing energy from right to left.

• Elements fill orbitals in order of increasing energy from top to bottom in each group.

• Elements fill orbitals in order of increasing energy from bottom to top in each group.

Which of the following symbols would be included in the noble gas notation for an element that had valence electrons in the 5s subshell?

• Ar

• Kr

• Xe

• Rn

In which orbitals would the valence electrons for selenium (Se) be placed?

• s orbital and f orbital

• s orbital only

• s orbital and p orbital

• d orbital only

How many valence electrons does aluminum (Al) have available for bonding?

• 1

• 2

• 3

• 4

What is the atomic number of zirconium?

• 39

• 40

• 41

• 42

Which element is the most reactive?

• sodium

• nickel

• carbon

• oxygen