GCHEMI Midterm Summative Test

What does the group number of an element represent?

• number of valence electrons
• number of electrons
• number of protons
• number of orbits

How many electrons can p orbitals carry?

• 6
• 2
• 10
• 14

What is the electron configuration of Calcium?

• 1s2 2s2 2p6 3s2 3p6 4s2
• 1s2 2s2 2p6 3s2 3p6 4s1
• 1s2 2s2 2p6 3s2 3p6 4s3
• 1s2 2s2 2p6 3s2 3p6 4s4

What is the electron configuration of Rubidium?

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p7

Using the group number, how many valence electrons does Platinum have?

• 10
• 11
• 12
• 9

Using the Periodic Table, compute the molar mass of baking soda (NaHCO_3).

• 84.02 g/mol
• 80.09 g/mol
• 85.06 g/mol
• 90.81 g/mol

What is the molecular mass of ammonia (NH_3)?

• 17.04 g/mol
• 18.04 g/mol
• 18.04 g/mol
• 16.04 g/mol

Which among the following elements has a molar mass of 197 g/mol?

• Gold
• Silver
• Zinc
• Tungsten

What is the molecular mass of bleach (NaOCl)?

• 74.45 g/mol
• 75.45 g/mol
• 73.45 g/mol
• 76.45 g/mol

What is the molecular mass of limestone (CaCO_3)?

• 100.09 g/mol
• 99.09 g/mol
• 98.09 g/mol
• 101.09 g/mol