Ionic
Which has a charge of +2 Selenium or Strontium
Strontium
It is a metal that loses two electrons to have a full valence energy level
If a compound has a low melting point would you be able to run a current through a solution of it to power a light bulb
No. False
Low melting point is a characteristic of a covalent bond, but conductivity is a property of ionic bonds.
4Fe + 2O2-- 2Fe2O2
What are the name of the product(s)
Iron Oxide
product is the right side of the equation
Fe- Iron O- Oxygen
is an Ionic bond
Name the polyatomic ion with a positive one charge. Give name and full symbol
Ammonium NH4+
Ammonium is the only polyatomic ion (that we learned about) with a charge of +1
Hypothesize the charge of an ion if the element came from group 6
Anion
nonmetals become anions
Name the level of bond between the two nitrogen atoms in N2
Triple
Nitrogen has five valence electrons tree of which bond with three valence electrons from another lone nitrogen atom
Why is this not correct
H2 + O -- H2O
O must be O2
Oxygen is a diatomic molecule
Predict the molar mass of a compound with Fe2Cl5
288.93 g
the molar mass of iron is 55.84 multiply that by two
molar mass of chlorine is 35.45 multiply by five
then add
group the qualities of ionic compounds into physical and chemical
Physical Chemical
solid conduct electricity
rigid/hard crystal lattice
ionic bonds form a crystal lattice that gives it’s physical properties. and when dissolved in water the ions separate and are electricity conductive
Predict the name of a binary compound with the formula CO2
Carbon dioxide
there is one atom of carbon so it stays the same and there are two oxygen atoms so the prefix di is added
Na2S+Ni(NO3)2-- NaNO3+NiS
Balance.
Coefficients.
1 1 2 1
The coefficient of two balances the sodium on both sides. insuring no matter is lost nor created
If a compound has three atoms and no lone pairs, infer the shape of the covalent compound
trigonal pyramidal
The lone pair on the central atom repels the three outer atoms
Name an ionic compound with oxygen and sodium
sodium oxide
sodium the cation is as is and oxygen the anion ends in ide
Compare the molar mass of H2O and C6H12O6
C6H12O6 (Sugar) has a a higher mass than H2O (water)
Find the coefficients
_Al + _CuCl2-- _AlCl3 + _Cu
2 3 2 3
Keeps the equation balanced
Predict the products of the following single and double replacement reactions
Ca + H2O--
AgNO3 + NaCl--
CaO + H2
AgCl + NaNO3
In the single replacement, calcium takes the place of hydrogen so hydrogen is left alone
In the double replacement, the cations switch
when looking at C3H8 + 5O2-- 3CO2 + 4H2O
What are 3 coefficient ratios
A:B=1:5; A:C=1:3; A:D=1:4
A has a coefficient of one, B has a coefficient of five, C has a coefficient of 3, and D has a coefficient of four
compare the charges of lead (III) & Lead(II)
lead (III) has a charge of+3 lead (II) has a charge of +2
the roman numeral indicates the charge of the transition metal
How many moles of hydrogen are there in carbon tetrahydride
4
Carbon tetrahydride= CH4
4= four atoms/moles
Will this react?
Zn+CuBr2
yes
Zinc has higher reactivity than copper
What type of reaction breaks down large compounds
Decomposition
the reactant is broken down into smaller products