Chem1 Q1 EQE Review

Which of the following statements is NOT part of Dalton's Atomic Theory?

• All matter is composed of tiny, indivisible particles called atoms.

• Atoms of the same element are identical in mass and properties.

• Atoms can be created or destroyed in chemical reactions.

• Compounds are formed by a combination of two or more different kinds of atoms.

The Law of Conservation of Mass states that:

• Matter is created in chemical reactions.

• Matter is destroyed during chemical reactions.

• The total mass before and after a chemical reaction remains the same.

• The composition of a compound can vary depending on its source.

Which of the following laws explains why water always contains 8 grams of oxygen for every 1 gram of hydrogen?

• • Law of Multiple Proportions

• Law of Definite Composition

• Law of Conservation of Mass

• Law of Conservation of Energy

What is the maximum number of electrons that can occupy a single orbital?

• 1

• 2

• 4

• 6

Which of the following describes the trend of atomic radius across a period in the periodic table?

• Increases from left to right

• Decreases from left to right

• Stays the same

• First decreases, then increases

According to Dalton’s Atomic Theory, how do atoms of different elements differ?

• They have different masses and chemical properties.

• They have different shapes.

• They can be divided into smaller particles.

• They form ions only in liquid states.

Which quantum number defines the orientation of an orbital?

• Principal quantum number (n)

• Azimuthal quantum number (l)

• Magnetic quantum number (mₗ)

• Spin quantum number (mₛ)

Which of the following sets of quantum numbers is not allowed?

(Choose all possible)

• n = 3

  l = 1

  m_l = -3

  m_s = + 1/2

• n = 6

  l = 5

  m_l = 0

  m_s = - 1/2

• n = 2

  l = 1

  m_l = -1

  m_s = + 1/2

• n = 1

  l = 1

  m_l = 0

  m_s = - 1/2

In the electron configuration of neon (Ne), what is the set of quantum numbers of the last entering electron?

• n = 2

  l = 1

  m_l = -1

  m_s = + 1/2

• n = 2

  l = 1

  m_l = 1

  m_s = - 1/2

• n = 2

  l = 0

  m_l = 1

  m_s = + 1/2

• n = 2

  l = 0

  m_l = 0

  m_s = - 1/2

The electron configuration of an atom describes:

• The shape of its orbitals.

• The number of protons and neutrons in the atom.

• The mass of its nucleus.

• The arrangement of electrons in an atom’s orbitals.