Chemistry I-H Midterm Exam

What scientist came up with a mathematical formula, proposing that electrons travel in wavelike functions around the nucleus of an atom?

• Rutherford
• de Broglie
• Schrödinger
• Heisenberg

The number of energy levels for a given atom is found by looking at the:

• group number
• family number
• sublevel
• period number

Which set lists the quantum numbers of elements

• s, p, f, o
• s, p, d, f
• n, l, ml, s
• n, p, d, f

The principal quantum number of an element is 4. What are the possible angular momentum (l) quantum numbers for this element?

• +1/2, -1/2
• -3, -2, -1, 0, 1, 2, 3
• 0,1,2,3
• 4

Which group of the periodic table is composed of inert (non reactive) gases?

• Halogens
• Noble Gases
• Alkali earth metals
• Hydrogen Group

What type of mixture is this?

• homogenous
• colloid
• heterogenous
• solution

These elements are dull, brittle, and poor conductors.

• metalloids
• Noble gases
• nonmetals
• metals

Put the liquids in order from most dense to least dense?

• 4, 3, 2, 1
• 1, 2, 3, 4

Which of these is a homogeneous mixture?

• salt water
• sodium chloride
• sugar
• water

Whenever an excited hydrogen atom fall back from an excited state to its ground state, it __________.

• absorbs a photon of radiation
• emits a photon of radiation
• emits radiation over a range of frequencies
• absorbs specific frequencies of light.