Periodic Table Unit Test

What does periodic mean?

• Chaos.

• A pattern that repeats randomly.

• A regularly repeating pattern.

• The lack of a pattern.

As you move left to right across a period, the atomic number or effective nuclear charge increases, this explain what about the atomic radius trend?

• Why the atomic radius trend decreases up a group.

• Why the atomic radius trend increase left to right across a period.

• Why the atomic radius trend increase up a group.

• Why the atomic radius trend decreases left to right across a period.

Cations are always ______ than the parent atom and anions are always ______ than the parent atom.

• larger, smaller

• smaller, smaller

• larger, larger

• smaller, larger

The loss of a complete electron energy level explains what about ionization energies of phosphorous?

• The difference in ionization energies between the 1st and 2nd electrons removed.

• It’s first ionization energy.

• The large increase of energy between the 5th and 6th electrons removed.

• It’s last ionization energy.

When atoms react, they often lose, gain, or share electrons to form a more stable version of themselves. For example, alkali metals such as Na lose their outer shell electron in their reactions to form compounds. The electron configuration of alkali metals would then resemble those of which group of the periodic table in the compounds they form?

• 8A

• 2A

• 1A

• 7A

A main group element has 81 protons and an estimated effective nuclear charge of 3+. Therefore, the element has _____ core electrons and can be found in Group _____ of the Periodic Table. Which set correctly completes the blanks?

• 81, 5A

• 84, 3A

• 78, 3A

• 78, 5A

In the modern Periodic Table, which of the following represents the final pair of elements for which Newlands’ Law of Octaves would hold true?

• Al and Si

• Mg and Ca

• Al and Ga

• Ne and Ar

For the given elements, which reaction will proceed most quickly or be the easiest?

• Li and F

• Li and Cl

• Na and Cl

• Na and F

If one of the charges doubles, what happens to the force?

• gets cut by 1/4

• doubles

• gets cut by 1/2

• quadruples

The effective nuclear charge, Z_eff, experienced by valence electrons in an atom can be estimated from the equation: Z_eff = the number of protons - the number of core electrons.

Using this estimation, effective nuclear charge for main group elements would left to right across a period. Which option correctly completes the blanks in the statement?

• decrease

• increase
• remains the same