2.2

An atom is made up of which 3 subatomic particles?

• protons, electrons, neutrons

• Positive, negative, neutrals

• Protons, nuggets, electricity

• Pretzles, nuggets, electrocution

What is the definition of an atom?

• A pure substance

• The smallest unit of matter. Smallest particle of an element; made up of protons, electrons, and neutrons

• A small number written to the right of the element's symbol.

• A type of machine

What is the definition of a molecule?

• A combination of 2 or more elements

• The smallest unit of matter.

• When two or more atoms are joined or bonded together.

A proton has a _____ charge.

• positive +

• negative -

• neutral =

An electron has a _____ charge.

• positive +

• negative -

• neutral =

A neutron has a _____ charge.

• positive +

• negative -

• neutral =

What is an element?

• A type of weather

• A group of atoms with the same atomic number. An example would be Oxygen

• A mix of different substances

The atomic number is the number of _______ in an atom.

• Protons

• Electrons

• Neutrons

• Elements

An atom has 10 protons, 11 neutrons, and 12 electrons. What is the atom's atomic number?

• 10, the number of protons

• 11, the number of neutrons

• 12, the number of electrons

True or False: The Periodic Table of Elements has over 100 different types of elements.

• True

• False