Lesson 2

True or False: Matter occupies space and has mass.

• True
• False
• MAYBE
• DI KO SURE

What is the unit for mass?

• Kilogram
• Gram
• Pound
• Newton

True or False: Weight results from the force of gravity on matter.

• True
• False
• MAYBE
• DI KO SURE

Which of the following is the most abundant element in the Earth's crust?

• Carbon
• Hydrogen
• Calcium
• Oxygen

Which element is known for forming covalent bonds with itself and other molecules?

• Oxygen
• Hydrogen
• Carbon
• Calcium

What is the smallest particle of an element?

• Atom
• Molecule
• Proton
• Neutron

True or False: Protons are negatively charged particles.

• True
• False
• MAYBE
• DI KO SURE

What is the atomic number of an atom?

• The number of protons
• The number of electrons
• The number of neutrons
• The total mass

What is the mass number of an atom?

• Number of electrons
• Number of neutrons
• Number of protons and neutrons
• Number of protons

True or False: Isotopes have the same atomic number but different mass numbers.

• True
• False
• MAYBE
• DI KO SURE