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 their valence electrons
What is a covalent bond?
How many atoms of Hydrogen are there in C6H12O6
What is 12?
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 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 type of bond forms between a positive ion and a negative ion?
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?
Covalent bonds form between what 2 types of elements?
What is two nonmetals?
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 compound composed of positive metal ions (sodium) and negative non-metal ions (chlorine)
What is an salt or NaCl?
True or false - Covalent bonds can occur between atoms of the same element
What is true?
the total number of atoms in a molecule of carbon dioxide
What is 3?