MIDTERM QUIZ NO. 2

Which of the following molecules has the highest percent ionic character?

• HCl

• KCl

• NaCl

• HF

The ability of a substance to dissolve in another substance is known as:

• Density

• Viscosity

• Solubility

• Malleability

Which state of matter has definite volume but no definite shape?

• Solid

• Liquid

• Gas

• Plasma

Which of the following elements has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6?

• Arsenic (As)

• Krypton (Kr)

• Xenon (Xe)

• Radon (Rn)

A coordinate covalent bond forms when:

• Electrons are shared equally between atoms.

• Atoms share electrons in a fixed ratio.

• One atom donates both electrons in a bond.

• Electrons are transferred between atoms.

How many orbitals are there in the f sublevel?

• 1

• 3

• 5

• 7

The molecular geometry of a molecule with four electron pairs around the central atom is:

• Trigonal planar

• Tetrahedral

• Bent

• Linear

Which of the following statements is true about an exothermic reaction?

• It absorbs heat from the surroundings.

• It releases heat to the surroundings.

• It always involves a solid turning into a liquid.

• It occurs at a constant temperature.

A substance that cannot be broken down into simpler substances by chemical means is called a(n):

• Element

• Compound

• Mixture

• Molecule

The mass per unit volume of a substance is called its:

• Weight

• Density

• Volume

• Mass