Honors Chemistry Mid-term Exam

Front

What does the atomic mass represent?

Back

The atomic mass represents the mass of an atom, typically measured in atomic mass units (amu), which is a weighted average of the masses of an element's isotopes.

Front

How do you determine the number of significant figures in a calculation?

Back

Significant figures are determined by counting all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

What happens to particle movement when temperature increases?

Back

When temperature increases, the particles move more rapidly due to increased kinetic energy.

Front

Which state of matter has the highest kinetic energy?

Back

Gas has the highest kinetic energy among the three states of matter (solid, liquid, gas).

Front

How many valence electrons does Carbon have?

Back

Carbon has 4 valence electrons.

Front

What is the formula for calculating atomic mass?

Back

Atomic mass = (mass of isotope 1 * % abundance of isotope 1) + (mass of isotope 2 * % abundance of isotope 2) + ...

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom's nucleus and determines the element's identity.

Front

How do you perform multiplication with significant figures?

Back

The result should have the same number of significant figures as the measurement with the least significant figures.

Front

What is kinetic energy?

Back

Kinetic energy is the energy possessed by an object due to its motion, calculated as KE = 1/2 mv².