Shared Flashcard Set

Details

Chem Mod 8
Chem mod 8 teview
15
Chemistry
11th Grade
01/11/2012

Additional Chemistry Flashcards

 


 

Cards

Term

Which of the following atoms will have similar chemistry?

 

Na, Cu, K, N, Cs,

Definition
Na, K, and Cs since they are in the same column of the periodic chart.
Term

How many valence electrons are in this electron configuration?

 

1s22s22p63s23p64s23d104p5

Definition

Valence electrons exist in the orbital(s) at the highest energy level. The orbital(s) at the highest energy level have the largest number in front of them. In this case, 4s and 4p have the largest number in front, so there are seven valence electrons.

Term

A. Columns 1b-8b represent what kind of metals in the periodic chart?

 

B. In columns 1a-8a, what is the shortcut to know how many valence electrons are in an atom?

Definition

A. transistional metals

 

B. In columns 1a-8a, you can determine the number of valence electrons simply by looking to see what column the atom is in. For example, Na has 1 valence electron and we know this because Na is in the 1a column.

Term
The noble gases are in column (a.)_____ and they are unique because they have the (b.)_____ number of valence electrons
Definition

a. 8a

b. ideal

Term

What type of compound has a positive charge and why?

 

Definition
Ionic compounds have a positive charge because they give away electrons which are negatively charged. Thus, this creates a positive charged ion.
Term
What is a covalent compound?
Definition
It is a compound consisting only of nonmetals. Covalent compounds share electrons.
Term

a. What is ionization potential?

 

b. What is electronegativity?

Definition

a. The ionization potenial is the amount of energy needed in order to take an electron away from an atom.

 

b. Electronegativity is a mesure of how strongly an atom attracts extra electrons to itself.

Term
Explain why the ozone is needed for earth.
Definition
It makes life possible on earth by shielding the ultraviolet rays from the sun to the earth.
Term

What is the lewis structure for carbon?

 

What is the lewis structure for Cl?

 

Definition

● C

 

Cl

Term

 

Write the chemical formulas for the following compounds:

 

a. aluminum oxide

b.  chromium(III) chloride

 

 

 

Definition

a. Al is in group 3A, so it wants a charge of 3+. Oxygen is in group 6A, so oxide will have a charge of 2-.

Ignoring the signs and switching the numbers gives us Al2O3.

 

 

b. Cr is an exception, because there is a Roman numeral in the name. The numeral tells us that Cr

want a charge of 3+. Chlorine is in group 7A, so chloride will have a charge of 1-. Ignoring the signs and switching the numbers gives us CrCl

3.

Term

Order the following atoms in terms of increasing ionization potential: Sr, Ra, Mg.

Definition

Ionization potential decreases as you go down the chart. Thus, the order is Ra < Sr < Mg.

Term

Which atom has the greatest desire for extra electrons: Ge, Ca, or Br?

Definition

Electronegativity is a measure of an element’s desire for electrons. It increases as you move to the right on the chart, so Br has the greatest desire for electrons.

Term

 

Draw the Lewis structures for the following molecules:

 

 

 

a. NF3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b. CCl2S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Definition

a. [image]

 

 

B.      :Ċİ:

                 ı

    :Ċİ-  C -S:

              ● ●                        ●● 

 

 

 

 

Term
Define periodic property
Definition
A charactertistic of atoms that varies regularly across the periodic chart
Term
Define covalent bond
Definition
A shared pair of valence electrons that holds atoms together in covalent compounds
Supporting users have an ad free experience!