Chapter 15 Guided Reading Questions from Thursday 2/23

Guided Reading Chapter 15 Section 1 (starts on p334)

   1.    What is the difference between a physical and a chemical change of matter?

   2.    Currently, there are _________ elements that have been identified. _______ of these are naturally occurring.

   3.    How is the Periodic Table arranged?

   4.    Rows are known as _________ and columns are called ________.

   5.    What are the three main categories of matter elements are classified as on the Periodic Table?

   6.    What is the atomic mass of an element?

   7.    For the element Carbon list the Average Atomic Mass, Stable Mass Numbers, Element Symbol and Atomic Number.

   8.    What is the name of the group of elements that include Lithium, Sodium and Potassium?

   9.    Why are the noble gases called “inert”?

   10.  Periods represent the number of __________ ____________ needed to hold the appropriate number of electrons.

Guided Reading Chapter 15 Section 2

   11.  Most elements are _________ at room temperature.

   12.  What does it mean for an element to be in a solid state?

   13.  _______________ is the repeating pattern of chemical and physical properties of elements.

   14.  What type of element makes a good electrical and thermal conductor?

   15.  _____________ make good insulators.

   16.  What element is important to life and what two forms of this element occur in nature?

   17.  _____________ is the second most abundant element on Earth.

   18.  _____________ percent of the Earth’s crust is made up of Oxygen.

   19.  Name two important uses of Nitrogen.

   20.  Of what important process is Phosphorus a key ingredient?