Chemistry final

Change from standard form to scientific notation: 12,000,000

• 12.0  x  10⁷
• 0.12  x  10⁷
• 1.2  x  10⁶
• 1.2  x  10⁷

The smallest unit of matter that retains the properties of that matter is

• a molecule
• a compound
• a mixture
• an atom

Which statement best describes an element?

• any combination of two or more atoms of different types
• a pure substance made up of only one kind of atom
• a substance containing only carbon atoms
• any kind of crystal

Which of the following changes is a physical change of matter?

• water evaporating
• paper burning
• a nail rusting
• a silver spoon tarnishing

Which of the following is an example of a heterogeneous mixture?

• tap water
• chunky peanut butter
• orange-colored sugar water
• gold ring

The horizontal rows of the periodic table are called

• periods
• columns
• groups
• families

Which of these shows SI unit prefixes arranged in order from smallest to largest?

• centi, milli, kilo
• milli, centi, kilo
• kilo, milli, centi
• kilo, centi, milli

Classify the picture with the correct label.

• Element
• Compound
• Mixture of Elements
• Mixture of Compounds

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5