Ch.2 - Atoms & ElementsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Sections
The Atom
Subatomic Particles
Isotopes
Ions
Atomic Mass
Periodic Table: Classifications
Periodic Table: Group Names
Periodic Table: Representative Elements & Transition Metals
Periodic Table: Element Symbols
Periodic Table: Elemental Forms
Periodic Table: Phases
Periodic Table: Charges
Calculating Molar Mass
Mole Concept
Law of Conservation of Mass
Law of Definite Proportions
Atomic Theory
Law of Multiple Proportions
Millikan Oil Drop Experiment
Rutherford Gold Foil Experiment
Additional Practice
Thomson's Cathode Ray Tube Experiment
The Chadwick Neutron Experiment
Mass Spectrometry
Additional Guides
Periodic table Charges (IGNORE)
Calculating Molar Mass (IGNORE)
Calculating Grams to Moles (IGNORE)
LearnAdditional Practice
Next SectionCalculating Molar Mass

Elements lose or gain electrons to have the ideal number of outer shell electrons like the noble gases. 

Periodic Table Charges

Concept #1: Periodic Table: Charges

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Metals lose electrons and become cations. Non-metals gain electrons and become anions.

Example #1: From what you know about ion formation and the Periodic Table, which ion would be unlikely to occur?

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Concept #2: Main Group Elements

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Example #2: Predict the charge that a gallium ion would possess.

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Practice: Which element possesses a -2 charge when it combines with other elements?  

Concept #3: Transition Metals (Type II Metals)

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Transition metals have varying positive charges due to their electron arrangements. 

Example #3: Predict the major charge of an ion if it were discovered to be in Period 10, Group 3B.

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Practice: What is the likely charge of the element with an atomic number of 47?

Practice: How many electrons would the cadmium ion possess?  

Previous SectionPeriodic Table: Phases
Next SectionCalculating Molar Mass
Additional Problems
Which of the following might form a  -2 anion? a. Na b. Se c. Mg d. Si e. P
What is the common ion formed by nitrogen. 
If aluminum and sulfur formed ions, what would be their charges, respectively? A) 2+, 2- B) 3-, 1- C) 3+, 2-  D) 1+, 1-
In reactions to form ionic compounds, metals generally 1. lose electrons. 2. become non-metals. 3. do not react. 4. gain electrons
Which atom is most likely to form only a 2+ ion? a. iron b. barium c. aluminum d. copper e. fluorine  
What type of ions would be formed by potassium, aluminum and oxygen atoms, respectively? (A) P+, Al3+, O2- (B) K+, Al3+, O2- (C) K+, Al+, O6+ (D) K+, Al5-, O2- (E) K-, Al3-, O2+
Which ions should be formed by magnesium, nitrogen, and chlorine, respectively? (A) Mg2+, N3-, Cl- (B) Mn7+, N3-, C4+ (C) Mg2+, N5+, Cl- (D) Mg+, N5+, C4+ (E) Mg+, N3-, Cl-
Predict the charge of the ion formed by each element. a. Mgb. Nc. Fd. Na 
Using the periodic table, predict the charges of the ions of the following element: (a) Ga
Using the periodic table, predict the charges of the ions of the following element: (b) Sr
Using the periodic table, predict the charges of the ions of the following element: (c) As
Using the periodic table, predict the charges of the ions of the following element: (d) Br
Using the periodic table, predict the charges of the ions of the following element: (e) Se
When the elements barium and phosphorus form ions, what are their charges, respectively? A) 2+, 3- B) 3+, 2- C) 3+, 3- D) 1+, 1-
List the monatomic ions that the elements below are expected to form when they are incorporated into an ionic compound (give the symbol and the charge).           A)  sulfur         ____________B)  lithium       ____________C)  barium       ____________D)  chlorine     ____________
What monatomic ions would you expect potassium (Z = 19) and bromine (Z = 35) to form?
Which elements do you expect to lose electrons in their chemical reactions? Which do you expect to gain electrons?i. Gaii. Pbiii. Cliv. N
State the number of electrons lost or gained when the following elements form ions: Sb, Group 2A, As, Te, I
What is the charge on the most stable ion of each of the following elements?K, I, Mg, O, Al, N, Ba, S
From what you know about ion formation and the periodic table, which ion would be unlikely to occur?a. Rb +b. Ca 2+c. Al 3+d. Na 2+e. All of these ions are common ions.
For each of the following atomic numbers, use the periodic table to write the formula (including the charge) for the simple ion that the element is most likely to form in ionic compounds.a. 13b. 34c. 56d. 7e. 87f. 35
Metals and nonmetals can react with each other to form ions. Complete these statements.A potassium atom gains or loses (electrons/protons/neutrons) and forms how many ion?A sulfur atom gains or loses (electrons/protons/neutrons) and forms how many ion?
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