L2 HW ions versus isotopes HW

Document Sample
L2 HW ions versus isotopes HW Powered By Docstoc
					NAME:_______________________________________ DATE: _________ CLASS: _________

                    HOMEWORK: ions versus isotopes versus atoms

   1) IONS and ISOTOPES are special types of atoms. DESCRIBE how IONS and
      ISOTOPES are different from each other:




      ____________________________________________________________________________


Use your periodic table of elements or the one in the book (P. D20) - answer the
following questions:

 1) What is the atomic # of oxygen? ________    11) What is the atomic # of Fe? _________
 2) How many protons are in oxygen? _______     12) How many protons are in at atom of Xe?
                                               _______
 3) How many protons are in calcium? _______    13) What element is Hg? ______________
 4) What is the atomic mass of chromium? _____ 14) What is the symbol for Aluminum? _______
 5) How many protons are in Krypton? _______ 15) How many protons are in oxygen? _______
 6) What is the atomic # of Krypton? _________  16) What is the atomic # of Mn? ______
 7) What is the chemical symbol of Krypton?     17) What is the symbol of silver? _______
_____
 8) What element has the chemical symbol Sn?    18) How many protons does hydrogen have?
______                                         _____
 9) What is the atomic mass of Fe? _________    19) The symbol for carbon is: _________
 10) What element is Fe? _____________          20) What is the atomic # of Ti? ________



→Use page D10 to answer the following questions:

   1) What is the most common element in the universe?

   2) What is the most common element in the Earth's crust?

   3) What is the 2nd most common element in Earth's crust?

   4) How many different types of atoms are found in living things?

   5) What is the most common element in humans?

   6) What is the 2nd most common element in humans?
IONS (p. D14-D15):

DESCRIBE how an atom can become an ION:________________________________________



circle the correct answer:

    1) When CARBON loses an electron, it becomes a (positive or negative) ion.

    2) When FLOURINE gains an electron, it becomes a (positive or negative) ion.

    3) For Li to change to Li+, a Li atom would need to (gain an electron, lose an
       electron)

    4) For Li to change to Li-, a Li atom would need to (gain an electron, lose an electron)




----------------------------------------------------------------------------------------------------------------------------------------

ISOTOPES (p. D12-D13):

DESCRIBE how an atom can become an ISOTOPE:____________________________________




    1) How is chlorine-35 (Cl-35) different than Cl-36?:_________________________

         _____________________________________________________________________________




    2) Which isotope will have more mass – Cl-35 or Cl-36? _________________

    3) WHY?

    4) _______ Nitrogen has an atomic # of 7. An isotope of Nitrogen
       containing 6 neutrons would be:

         A)   N-14
         B)   N-13
         C)   N-7
         D)   N-6

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:6
posted:2/18/2012
language:English
pages:2