QUANTUM MECHANICAL NUMBER
Which of the following elements is paramagnetic?
A. 12Mg
B. 6C
C. 10Ne
D. 20Ca
B. 6C
When does covalent bonding take place?
A. It takes place when atoms share electrons.
B. It takes place when atoms transfer electrons.
C. It takes place when atoms collide with each other.
D. IT takes place when atoms attain stability.
B. It takes place when atoms transfer electrons.
Which of the following is NOT true about carbon?
A. It can form many types of bonds with other carbon.
B. It is one of the most abundant element in the universe.
C. Carbon-based molecules has 2 fundamental structures.
D. It has different allotropes.
C. Carbon-based molecules has 2 fundamental structures.
Which of the following statement differentiate molecular mass and formula mass?
A. Molecular mass is for covalent compound while formula mass is for ionic compound.
B. Molecular mass is for compounds made up of molecules while formula mass is for compounds made up of ions.
C. Molecular mass contains atomic mass of metal and non metal while formula mass contain atomic mass of both nonmetal elements.
D. They are just the same.
C. Molecular mass contains atomic mass of metal and non metal while formula mass contain atomic mass of both nonmetal elements.
If n=2 and l=1, what is the sublevel?
A. 2p
B. 3p
C. 2D
D. 2s
A. 2p
How is the bond of O2 and MgO differ?
A. The bond of O2 is metallic while the bond in Mg0 is covalent.
B. The bond of O2 is ionic while the bond in Mg0 is covalent.
C. The bond of O2 is covalent while the bond in Mg0 is ionic.
D. There is no difference between the 2.
C. The bond of O2 is covalent while the bond in Mg0 is ionic.
Which hydrocarbon contains triple bond?
A. Propane
B. Propene
C. Propyne
D. Propyl
C. Propyne
Glucose is a simple sugar. What elements compose glucose?
A. Calcium, Helium, Oxygen
B. Carbon, Hydrogen, Oxygen
C. Chlorine, Hydrogen, Oxygen
D. Cobalt, Helium, Osmium
B. Carbon, Hydrogen, Oxygen
Which of the following proposed that atoms are made from positively charged substance and negatively charged electrons scattered about like raisins in a pudding?
A. Ernst Rutherford
B. Erwin Schrodinger
C. J.J. Thomson
D. James Chadwick
C. J.J. Thomson
Which produces Mg2+ ions?
A. Mg atoms gain protons
B. Mg atoms gain electrons
C. Mg atoms lose electrons
D. Mg atoms share electrons
C. Mg atoms lose electrons
Which alkene will most likely to have the highest boiling point?
A. Methene
B. Butene
C. Ethene
D. Octene
D. Octene
A. Carbohydrates
B. Lipids
C. Protein
D. Nucleic Acid
C. Protein
If Sodium 11 belongs to the 3rd energy level and group 1 in the periodic table, what is the period number of Sodium?
A. 1
B. 2
C. 3
D. 4
C. 3
What is the formula for Magnesium Oxide?
A. Mg2O2
B. MgO2
C. Mg2O
D. MgO
D. MgO
A. CO2
B. CH3Cl
C. C6H12O6
D. CH4
A. CO2
How many atoms are there in 2 mole of Oxygen?
A. 6.02 x 1022 atoms
B. 1.20 x 1024 atoms
C. 1.20 x 1023 atoms
D. 12.04 x 1022 atoms
B. 1.20 x 1024 atoms
Magnesium has electron configuration of 1s2 2s2 2p6 3s2. Which of the following best describes Magnesium?
A. Family I-A Representative, Metal, s-block, period 3, At No. 12
B. Family II-A Representative, Metal, s-block, period 3, At No. 12
C. Family I-A Representative, Non-Metal, p-block, period 3, At No. 10
D. Family II-A Representative, Non-Metal, p-block, period 3, At No. 10
B. Family II-A Representative, Metal, s-block, period 3, At No. 12
If the electron configuration of Magnesium 12 is 1s2 2s2 2p6 3s2 and it is a metal, what is the charge of Magnesium ion?
A. +1
B. +2
C. -1
D. -2
B. +2
What if the molecular formula of Ethane with 2 carbon compound?
A. C2H6
B. C2H4
C. C2H2
D. C2H8
A. C2H6
Find the mass % of Al2O3. Which element makes up most of the mass of the molecule?
A. Aluminum
B. Oxygen
C. Same
D. None
A. Aluminum