Chem Comp Review II

What does an orbital represent?

• the limits of the electron location

• the probability of the electron location

• the circular path that an electron travels around the nucleus

• the minimum distance between the electron and the nucleus

Which occurs if an electron transitions from n = 5 to

n = 2 in a hydrogen atom?

• Energy is absorbed, and visible light is emitted.

• Energy is released, and visible light is emitted.

• Energy is released, and visible light is not emitted.

• Energy is absorbed, and visible light is not emitted.

The energy sublevels that form the third energy level are

• s

• s,p

• s,p,d

• s,p,d,f

The maximum number of electrons that saturates the principal energy level (n) is given from the rule

• 2n

• n²

• 2n²

• (2n)²

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

What is the electron configuration of Sulfur  using noble gas method

• [Ne]3s¹
• [Ne]3s²3p³
• [Ne]3s²3p⁴

Which distinguishes chemical changes from physical changes?

• Physical changes alter the properties of the substance while chemical changes maintain the same properties

• Physical changes are permanent while chemical changes are temporary

• Chemical changes produce new substances while physical changes do not

• Chemical changes result in a change in mass, while physical changes do not

Which statement best explains how periods on the periodic table are organized?

• increasing number of neutrons from left to right

• increasing atomic number from left to right

• decreasing number of electrons from left to right

• decreasing atomic mass number from left to right

Why are Beryllium (Be), Magnesium (Mg), and Barium (Ba) in the same group?

• They have similar melting points

• They have are all in the same state of matter at room temperature

• Elements in the same group will chemically react with and identical element

• They have similar physical and chemical properties