Electrons in atoms Scientific Notation.

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Presentation transcript:

Electrons in atoms Scientific Notation

Scientific Notation Base x 10 exponent RULES Base number MUST be between 1.00 and 9.99 Exponents Numbers < 1 have a negative exponent. Numbers >1 have a positive exponent.

Scientific Notation 65,000 kg  6.5 × 104 kg Converting into Scientific Notation: Move decimal until there’s 1 digit to its left. # of Places moved = exponent number Original # is >1 gets a positive exponent Original # is <1 gets a negative exponent 65,000 kg  6.5 × 104 kg

D. Scientific Notation Practice Problems 2,400,000 mg 0.00256 kg 7  10-5 km 6.2  104 mm

Scientific Notation Type on your calculator: EXP EE EXP EE EXE 5.44 7 Calculating with Scientific Notation (5.44 × 107 g) ÷ (8.1 × 104 mol) = Type on your calculator: EXP EE EXP EE ENTER EXE 5.44 7 8.1 ÷ 4 = 671.6049383 = 670 g/mol = 6.7 × 102 g/mol