Chem Final pt.1
What happens to metallic properties of the elements as you move up from lead (Pb) to Carbon (C) on the periodic table?
Located in the same group but the average Atomic Mass decreases as you move up. Electronegativity increases since it is closer to Flourine.
Which is homogeneous of these four: 1. Soil 2.Air 3. Ice Water 4.Cereal in Milk
What is the charge of the Chromium in the CrI2?
+2 (undo the crossing method)
Balance the equation and IDENTIFY the type of reaction:
Fe + O2 ---> Fe2 O3
(Draw your t table with reactants and products)
4Fe + 3O2 ---> 2Fe2 O3
(Synthesis reaction)
Draw the orbital diagram for Nickel (Ni)
| ↑ ↓ | ↑ ↓ | ↑ ↓ ↑ ↓ ↑ ↓ | ↑ ↓ | ↑ ↓ ↑ ↓ ↑ ↓ | ↑ ↓ |
1s2 2s2 2p6 3s2 3p6 4s2
| ↑ ↓ ↑ ↓ ↑ ↑ ↑ |
3d7
What element does the orbital diagram (1s2 2s2 2p6 3s2 3p4) represent?
Sulfur
According to the Aufbau principle, which of the following is the highest in energy?
- 3d
- 4d
-5s
-4p
4d
What is the correct name of the compound with a Chemical Formula of Cl2O?
Dichloride Monoxide
SILVER:
Protons: 47
Electrons: 47
Neutrons: 60
Atomic Symbol of Xenon
Xe
Draw the Electron Configuration OR Orbital Filling Diagram for the most common ion formed by Sulfur, and indicate which electrons have been lost or gained.
** draw on white board
How many electrons does the P3- ion have? (remember if it is - it gained electrons but if it is + it lost electrons)
P3- ion has 18 electrons.
What is the empirical formula of a compound that contains 50.05% Sulfur and 49.94% Oxygen by Mass?
**Show work on the board (Ven or Melissa)
How does the bonding of Sulfur change when it reacts with Rubidium VS. Flourine?
*** CHECK YOUR PERIODIC TABLE
- When SULFUR (S) is combined with RUBIDIUM (Rb): Ionic bond
When SULFUR is combined with FLOURINE (F): Covalent bond
Balance: C3H8O2 -> H6O+CO2
(Draw the T-table out)
R: P:
C - 3 C - 3
H - 8 H - 8
O - 10 O - 10
C3H8 + 5O2 -> 4H2O + 3CO2
How many moles of N2O3 are there in 85.1g of Dinitrogen Trioxide?
85.1g x 1mole/76g = 1.12 moles
(76g comes from adding up amu)
What is the formula of the compound of Sodium ions and Phosphorus ions?
Sodium is Na+1 (if there's is 1 it's never written)
Phosphorus-3
(now crisscross) Na1P3 --> Na3P
Which of the following elements would be poor conductors of heat+electricity:
- Ni, Sr, V
- Se, I, P
- K, Sc, In
- B, Si, Ga
Se, I, P
Which element combined with HCl would result in no reaction?
- Fe
-Ag
-Mg
-Ni
-SILVER (Ag)
Name "KI"
(Look in PERIODIC TABLE and remember how a ionic bond is named)
Potassium Iodide
Which of the following is not one of the 5 principles of Dalton's Theory:
1. All matter is made of indestructible atoms
2. Atoms of different elements combine in complex, fractioned ratios to form compounds
3. Atoms of different elements vary in size and mass
2. Atoms of different elements combine in complex, fractioned ratios to form compounds
Complete the chart using the give information
**Chart is drawn on white board
***
Which reaction is a SINGLE REPLACEMENT reaction:
**Drawn on smart board
A. Fe + PbSO4 ---> FeSO4 +Pb
Which element below, combined with NaCl (aq/aqeuous) would result in a reaction (Check PT for electronegativity):
- At
-F2
-I2
- Br2
-F2 (Flourine) because it is highest in electronegativity.
Electron Configuration for Caesium (Cs)
1s22s22p63s23p64s23d104p65s24d105p66s1