CHAPTER 5 REVIEW
The Periodic Law
Answer the following questions in the space provided.
Consider a neutral atom with 53 protons and 74 neutrons to answer the following questions.
What is its atomic number?
What is its mass in amus?
Is the element’s position in a modern periodic table determined by its atomic number or by its atomic mass?
Consider an element whose outermost electron configuration is 3d104s24px.
a. To which period does the element belong?
If it is a halogen, what is the value of x?
The group number will equal (10 2 x). True or False?
Metalloids are found in which block, s, p, d, or f ?
The hardest, densest metals are found in which block, s, p, d, or f ?
Name the most chemically active halogen.
Write its electron configuration.
Write the configuration of the most-stable ion this element makes.
Referring only to the periodic table at the top of the Section 5-2 Review on page 35, answer the
following questions on periodic trends.
Which has the larger radius, Al or In?
Which has the larger radius, Se or Ca?
Which has a larger radius, Ca or Ca2?
d. Which has greater ionization energies as a class, metals or nonmetals?
Which has the greater ionization energy, As or Cl?
An element with a large negative electron affinity is most likely
to form a positive ion, a negative ion, or a neutral atom?
CHAPTER 5 MIXED REVIEW
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