This video introduces electrons and their orbitals.

- Science > General
- Science > Chemistry

- Grade 9
- Grade 10
- Grade 11
- Grade 12
- Higher Education
- Graduate
- Undergraduate-Upper Division
- Undergraduate-Lower Division

Compare, order, estimate, and translate among integers, fractions and mixed numbers (i.e., rational numbers), decimals, and percents.

Use ratios and proportions in the solution of problems involving unit rates, scale drawings, and reading of maps.

Represent numbers in scientific notation (positive powers of ten only) and use that notation in problem situations.

Demonstrate an understanding of absolute value, e.g., |-3| = |3| = 3.

Apply the rules of positive integer exponents to the solution of problems. Extend the Order of Operations to include positive integer exponents.

Use the inverse relationships of addition and subtraction, and of multiplication and division, to simplify computations and solve problems, e.g., multiplying by 1/2 or 0.5 is the same as dividing by 2.

Estimate and compute with fractions (including simplification of fractions), integers, decimals, and percents (including those greater than 100 and less than 1).

Determine when an estimate rather than an exact answer is appropriate and apply in problem situations.

Select and use appropriate operations-addition, subtraction, multiplication, division, and positive integer exponents-to solve problems with rational numbers (including negatives).