23-24 1st Semester Honors Chemistry Review

Front

How many significant figures does the number 0.002040 have?

Back

4 significant figures.

Front

What charge does a Beryllium ion have?

Back

2+ charge.

Front

Which Calcium isotope is the most abundant: 35.00 amu, 40.00 amu, or 41.00 amu?

Back

40.00 amu is the most abundant.

Front

What is the name of the compound CuCO₃?

Back

Copper (II) carbonate.

Front

Which of the following will not conduct when dissolved in solution: Sugar, Lithium Oxide, Sodium Chloride, or Potassium Iodide?

Back

Sugar will not conduct.

Front

Define significant figures in measurements.

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in the decimal portion.

Front

What is an isotope?

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Front

Explain the difference between ionic and covalent bonds.

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is the formula for calculating the molar mass of a compound?

Back

Add the atomic masses of all atoms in the compound's formula.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.