CBRC Diagnostic Exam Chem

It is the sum of the number of protons in the nucleus of each atom of the element

• Mass number

• Atomic symbol

• . Atomic number

• Molecular weight

It indicates the shape of an orbital.

• Magnetic quantum number

• Spin quantum number

• Principal quantum number

• Angular quantum number

It is an interconversion of matter from solid to liquid.

• Deposition

• Sublimation

• Evaporation

• Melting

A scientist who proposed the “Nuclear Model”.

• Dalton

• Bohr

• Thompson

• Rutherford

Which of the following is true regarding a reducing agent?

• Decrease in valence

• Reducing agent undergoes oxidation

• Gains electron

• Reducing agent undergoes reduction

It is a state of matter that has the ability to flow and its individual particles are confined to a given volume.

• Solid

• Plasma

• Liquid

• Gas

Which of the following is not true regarding heterogeneous mixtures?

• Particles cause Tyndall effect

• Not uniform

• An example is a salt solution

• Combination of two or more compounds

It is a state at which the amount of reactants and products present are constant.

• Chemical reaction

• Chemical equation

• Chemical process

• Chemical equilibrium

What is the oxidation number of permanganate ion?

• -2

• -1

• +2

• +1

What type of reaction is involved in this example: 2KI+Pb(NO3)2→2KNO3+PbI2?

• Synthesis

• Decomposition

• Double replacement

• Single replacement