Could someone make sure My answers are correct... Thank you
What is the difference between covalent and ionic bonds?
Answer: Covalent bonds share electrons; ionic bonds transfer electrons
What is the charge on the metal ion in iron bromide: FeBr3?
Answer: +3
What would be the proper chemical formula for combining these two ions:
Al+3 and Cl-1
Answer: AlCl3
Name the following compound: NaF. Hint: Is this an ionic or covalent compound?Answer: sodium fluoride
What is the charge on the nonmetal in the ionic compound calcium phosphide?
Answer: -3
Given the Lewis dot structures of oxygen and magnesium, predict the ionic formula. *Mg* *O*
Answer: MgO
Hint: When you have a lewis dot structure, you can move the electrons from the metal to the nonmetal until there are zero or 8 dots around each. If necessary, you add more atoms until all atoms have this octet. Then you add up how many of each element you have and those are the subscripts!
Select all correct statements relating to the octet rule.
Answers:
atoms require 8 valence electrons in order to be stable.
atoms will share or transfer electrons in order to be stable.
When Beryllium and Fluorine join together,
Answer: a Beryllium atom donates two electrons, one to each Fluorine atom.
Hint: Beryllium is in group 2 so it has 2 valence electrons. Since Fluorine can only take one, there must be 2 fluorine atoms that bond with each beryllium atom.
Determine if each property relates to ionic or covalent bonds, both of them, or if the statement is completely false (nether).
Low melting point
give and take electrons
atoms come together to form compounds
salts
molecules
do not conduct electricity
electrolytes
cations and anions
high boiling point
want to reach octet to be stable
only exist as liquid and gases
share or transfer protons
strongly bonded crystalline structure
Contain a metal and a nonmetal
Contain all nonmetals
Answers:
covalent, ionic, both ionic and covalent, ionic, covalent, covalent, ionic, ionic,ionic, both ionic and covalent, neither ionic nor covalent, neither ionic and covalent, ionic, covalent
Check all of the prefixes that are correctly matched with the number they represent.
mono- 1
penta- 5
octa- 8
tri- 3
Match the element or the group to its number of valence electrons.
Group 2
Phosphorous
Sodium and Potassium
the Nobel Gases
Bromine and Chlorine
Carbon
Group 13
Oxygen and Sulfur
answers: 2,5,1,8,7,4,3,6
What is the charge on the metal ion in Silver Oxide, Ag2O?
Answer: +1
Hint: Oxygens subscript is a 1, so that's the charge on silver.
An ionic compound has a generic formula of QR2.
Which elements could the Q and R represent?
Once you choose an answer, check it by plugging those elements into the QR2 formula to see if it looks right.
Answer: Q= Magnesium R= Chlorine
Hint: To write an ionic formula, the charges are crossed down to form subscripts. So, take the subscripts and cross them up to see the charges!
Then consult the periodic table to find out which elements have those charges.
The first element in an ionic formula is always a metal so this will be in group 1, 2, or 13.
The second element in an ionic formula is always a nonmetal and will be found in group 15, 16, or 17.
Name this compound: PCl3
Is it ionic or covalent?
Answer: Phosphorous Trichloride; covalent
What is the formula for dinitrogen pentaoxide?
Answer: N2O5
Determine whether the compound is ionic or covalent.
BaF
AlN
NO
water
calcium iodide
sugar
answers: ionic, ionic,covalent, covalent, ionic, covalent
