Need help on an exam on Chemistry

4/18/2018

1

N'vida E. Houndonougbo

Exam 1: Learning objectives

• Define chemistry and describe its role in our society

• Describe the early practice of chemistry.

• Identify the steps in the scientific method.

• Describe the modern practice of chemistry.

• Define and Describe the importance of green chemistry and

sustainable chemistry

• Differentiate mass and weight; physical and chemical

change; and physical and chemical properties.

• Classify matter according to state and as mixture, substance,

compound, and/or element.

• Define alloys and their importance in our society

• Write chemical formulas

• Distinguish atoms from molecules

N'vida E. Houndonougbo

Exam 1: Learning objectives (con’t)

• Write numbers using scientific (exponential)

notations

• Assign proper units of measurement to

observations and manipulate units in conversions.

• Calculate the density, mass, or volume of an object

given the other two quantities.

• Explain how the temperature scales are related.

• Distinguish between heat and temperature.

4/18/2018

2

N'vida E. Houndonougbo

Exam 1: Learning objectives (con’t)

• Sketch the nuclear model of the atom, and identify

its parts.

• List the particles that make up the nucleus of an

atom, and give their relative masses and electric

charges.

• Identify elements and isotopes from their nuclear

particles.

• Calculate atomic weight using the following formula:

Atomic weight = (isotope abundance)*(isotope mass)

• Describe what a mole is and how it is used.

• Calculate a molar mass of a substance