Chemistry Ions and Elements
The cations of group 1A elements always have a charge of ___________.
+1
Among Group 1A and 2A elements, the group number is equal to the number of valence electrons in an atom of that element. AT~ST~NT
AT
The chemical properties of an element are largely determined by the # of valance electrons the element has. AT~ST~NT
AT
The transfer of valence electrons produces positively charged ions, or ________, and negatively charged ions called _______.
Cations Anions
For transitions metals, the ____ of cations may vary.
Charges
The _______ number of a representative element indicates how many valence electrons that element has.
Group
______ are produced when atoms of the elements in Group 7A _______ an electron.
Halide Ions Gain
An atom of an element in Group 1A has seven valence electrons. AT~ST~NT
NT
Sulfur and magnesium both have 2 valence electrons. AT~ST~NT
NT
The chlorine atom gains seven electrons when it becomes an ion. AT~ST~NT
NT
Gilbert Lewis's ________ states that in forming compounds, atoms tend to achieve the electron configuration of a noble gas.
Octet Rule
Atoms acquire the stable electron structure of a noble gas by losing electrons. AT~ST~NT
ST
Elements within the same group of the periodic table behave similarly because they have the same number of __________
Covalence Electrons
Diagrams that show valence electrons as dots are called ______.
Lewis Dot Structure
