Question

pre - test (turn in on the due day of the test)
must be handwritten
use color to differentiate sections
label sections/state ideas
needs to show a high level of effort, detail, thought and care. this is not something you scribble out right before it is due
do not copy all of your notes - this should be a summary of the chapter
your answer must include:
definition and examples of atoms vs. ions
identify subscripts and include an example
identify oxidation numbers and include an example
identify coefficients and include an example
definition and examples of ionic vs. molecular compounds
example of the criss - cross method or chart method for writing ionic formulas
rules for writing ionic formulas (positive before negative, parentheses, roman numerals, etc.)
rules and examples of naming a molecular compound
example(s) of balancing equations
location of metals vs. nonmetals on periodic table
you always get a periodic table to use on a test - this includes the ion table on the back. no need to memorize!
you will also be given the prefixes...do not memorize them, just know how to use them!
practice test

1. using the periodic table below, label the area containing metals and shade in the elements that are nonmetals. (do not add element symbols!)
2. compounds made from a metal and nonmetal are called _______________ compounds.
3. define: ion.
4. indicate the number of each ion in cabr₂: ca²⁺ __________ br⁻ __________
5. indicate the number of each ion in sr₃(po₄)₂: sr²⁺ __________ po₄³⁻ __________
6. compounds made from 2 nonmetals are called _______________ compounds.
7. indicate the number of each atom in p₄o₁₀: p __________ o __________
8. the name of each molecular compound ends in _______________.

Explanation:

Step1: Answer question 1

On the periodic - table, metals are on the left - hand side and non - metals are on the right - hand side. One would label the left - hand area as metals and shade in the right - hand elements as non - metals.

Step2: Answer question 2

Compounds made from a metal and non - metal are called ionic compounds.

Step3: Answer question 3

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Step4: Answer question 4

In $CaBr_{2}$, the number of $Ca^{2 + }$ ions is 1 and the number of $Br^{-}$ ions is 2.

Step5: Answer question 5

In $Sr_{3}(PO_{4})_{2}$, the number of $Sr^{2+}$ ions is 3 and the number of $PO_{4}^{3 - }$ ions is 2.

Step6: Answer question 6

Compounds made from 2 non - metals are called molecular compounds.

Step7: Answer question 7

In $P_{4}O_{10}$, the number of P atoms is 4 and the number of O atoms is 10.

Step8: Answer question 8

The name of each molecular compound ends in - ide.

Answer:

1. Label left - hand area as metals and shade right - hand elements as non - metals on periodic table.
2. Ionic
3. An atom or molecule with a net electrical charge due to electron loss or gain.
4. $Ca^{2+}$: 1, $Br^{-}$: 2
5. $Sr^{2+}$: 3, $PO_{4}^{3 - }$: 2
6. Molecular
7. P: 4, O: 10
8. - ide