Periodic Table
The number of electrons in the lowest energy level (first circle on the Bohr model)
What is 2 electrons?
The number of dots around Sodium on an electron dot diagram?
What is one (1)?
Sodium loses an electron to become stable. What kind of ion does it become?
What is Na+ or Na+1?
A chemical bond formed when two atoms share one or more pairs of valence electrons
What is a covalent bond?
a group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound
What is the chemical formula?
What group of elements all have two valence electrons?
What is group 2 (alkaline earth metals)?
The number of dots around Strontium on an electron dot diagram?
What is 2?
Chlorine gains an electron to become stable. What kind of ion does it become?
What is Cl- or Cl-1?
The overall charge of a molecular bond/covalent bond is
What is neutral (0)?
The chemical formula for 2 atoms of carbon and 4 atoms of hydrogen looks like...
What is C2H4?
The group of elements that has a full outer shell and is stable.
What are the noble gases (Group 18)?
The number of dots around silicon on an electron dot diagram
What is 4?
What the attraction between a positive ion and a negative ion? (vocabulary term)
What is an ionic bond?
Two or more atoms that are held together by covalent bonds and act as a unit
What is a molecule?
The chemical formula for a water molecule is
What is H2O?
the number of electrons in bromine's outer shell
What is 7?
the number of dots around helium on an electron dot diagram
What is 2?
A substance containing atoms of two or more different elements chemically bonded together
What is a compound?
When an atom shares two pairs of electrons with another atom
What is a double bond?
The chemical formula for carbon dioxide molecules is
What is CO2?
How many valence electrons do the elements in group 15 have?
5
What does the dot diagram for tin look like? Explain.
What is Sn with 4 dots around it, one dot on each side?
A hard, crystalline solid compound composed of positive metal ions (sodium) and negative non-metal ions (chlorine)
What is an ionic salt or NaCl?
The type of bond between 2 nitrogen atoms (single, double, or triple?)
What is a triple bond?
the total number of atoms in a molecule of carbon dioxide
What is 3?