Billions and Billions

What is scientific notation?

• A way to express very large or very small numbers

• A method for categorizing scientific disciplines

• A notation for scientific experiments

• A formula used in scientific calculators

Why do scientists use scientific notation?

• To simplify the recording and discussion of very large or very small numbers

• To make experiments easier to conduct

• To increase the complexity of mathematical calculations

• To reduce the need for laboratory equipment

What are two ways of writing the smallest number in the table? What does it represent?

• Binary and hexadecimal; represents the minimum value

• Scientific notation and long-hand; represents the minimum value

• Decimal and binary; represents the minimum value

• Fractional and decimal; represents the minimum value

What are two ways of writing the largest number in the table? What does it represent?

• Scientific notation and standard form, representing the highest value

• Binary and hexadecimal, representing the maximum memory address

• Roman numerals and Arabic numerals, representing historical values

• Decimal and fraction, representing mathematical concepts

Which has the most mass?

• 1 trillion atoms of zinc

• 100 trillion atoms of iron

• 500 trillion atoms of aluminum

How many zinc atoms are there in 65.4 g?

• 6.02 x 10²³ atoms

• 3.01 x 10²³ atoms

• 12.04 x 10²³ atoms

• 1.20 x 10^-24 atoms

Some of the numbers in scientific notation have a negative exponent, and some have a positive exponent. What is the difference between these two types of numbers?

• Numbers with a negative exponent represent large numbers.

• Numbers with a positive exponent represent small numbers.

• Numbers with a negative exponent represent small numbers.

• There is no difference; it's just a notation preference.

What do 65.4 g of zinc, 27.0 g of aluminum, and 55.8 g of iron have in common?

• They represent one mole of each element.

• They have the same atomic number

• They are all non-metals

• They are all gases at room temperature

What name do chemists give to a collection of 602 sextillion objects?

• Mole

• Atom

• Molecule

• Particle