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On the periodic table, the group number is a shortcut to identify what about an atom?
Number of valence electrons
sodium chloride
What is NaCl
What is the name of this formula: LiS
Lithium sulfide
What is a molecule
a neutral group of atoms joined by covalent bonds
Magnessium bromide is an ionic compound with the chemical formula AlCl3 What does the 3 tell you?
there are three chlorine ions for every aluminum ion
Any elements in the same group or family will have the same number of what?
Valence Electrons
Magnesium Chloride
What is MgCl2
What is the formula for the compound sodium nitride?
Na3N
Molecules that contain two polar bonds are______________
sometimes polar
When an atom loses an electron it becomes a_______
positive ion
What rule refers to atoms losing or gaining electrons so they can achieve a full valence shell?
octet rule or duet rule
Aluminum Bromide
What is AlBr3
What is the name of the compound NaCl
Sodium Chloride
A chemical bond that is formed when two atoms share electrons is called
covalent bond
An ionic bond is__________
the attraction of oppositely charged ions
What group of elements will not react with other elements on the periodic table?
Group 8A, group 18, or the noble gases.
sodium nitrate
What is Na(NO3)
What is the formula for calcium Carbide?
Ca2C
What is a double bond?
two pairs of electrons that are shared between two atoms
Ions that are made of more then one atom are examples of _______
polyatomic ions
What is the the oxidation number or charge of a magnesium ion
+2
Lead Hydroxide
What is Pb(OH4)2
What is the chemical formula for the compound created from Potassium and Oxygen
K2O
A covalent bond in which electrons are shared enequally is called
What is Polar
When an atom gains an electron, it becomes a
negative ion