grams/moles/atoms
one mole of KCl contains how many moles of K?
Of Cl?
K: 1
Cl: 1
What is the e- config for neon?
1s22s22p6
How many valence electrons does neon have?
8 (noble gas)
When a transitional metal is involved
What are the steps for determining the empirical formula
1. Convert mass percent to grams
2. Convert to moles
3. Divide by the smallest number of moles
4. (case by case) Multiply values by integer to obtain whole numbers
If you have one mole, how many moles of each element do you have in the compound Mg(NO3)2
Mg:1
N:2
O:6
What is the abbreviated e- config for Cl?
[Ne] 3s23p5
What is the trend for ionization energy?
Increases going bottom to top AND going from left to right.
What does the prefix penta mean?
You have 5 of element X
What is the difference between how to determine the empirical and molecular formula?
Empirical is the lowest formula possible, while molecular is not. The same steps are followed for determining empirical and molecular, but molecular has an extra step where you divide the mass of the molecular formula by the empirical formula to determine the number you must multiply the empirical by.
If you have 8.3 g of each of the following elements, Neon, Mercury, Sulfur, and Magnesium, rank them in increasing moles.
Hg<S<Mg<Ne
How many orbitals do d-sublevels contain?
5
Which group has the highest ionization energy?
8A (noble gases)
how do you name an ionic compound?
metal then nonmetal
What is the chemical formula for calcium phosphide?
Ca2P3
How many atoms in one mole of Ag?
6.02 x 1023
the e- config for Li+
1s2
What is the trend for atomic radius?
Increases going from top to bottom AND going from right to left.
What is the name of the element: 28X14
Silicon
Top= atomic mass
bottom= atomic number
If the empirical formula is C3O8H2 and the molecular mass is 664.184 g/mol. What is the molecular formula?
C12O32H8
If you have 18.3 g of carbon monoxide, how many grams of carbon do you have?
7.85 g of Carbon
the e- config for P3-
1s22s22p63s23p6
Which element has the largest atomic radius?
Francium
What is the name of this compound?
Al2(CO3)3
Aluminum carbonate
If you have 48.4% of Carbon, 21.4% Oxygen, and 47.0% Nitrogen, what is the empirical formula?
C6O2N5