6th Grade Science: Chapter 8 Lesson 1 and 2

What is found at the center of the atom, within a tiny, dense nucleus?

• Electrons
• Protons and Neutrons
• Neutrons only
• Protons only

Surrounding the nucleus is a cloudlike region of moving __ _______.

• Protons
• Neutrons
• Electrons
• Positrons

What is a Proton?

• A subatomic particle that has a negative charge
• A subatomic particle that has a positive charge and that is found in the nucleus of an atom
• A subatomic particle that has no charge and that is found in the nucleus of an atom
• A subatomic particle that is found outside of the nucleus

What is a Neutron?

• A subatomic particle that has a negative charge
• A subatomic particle that has a positive charge and that is found in the nucleus of an atom
• A subatomic particle that has no charge and that is found in the nucleus of an atom
• A subatomic particle that is found outside of the nucleus

What is an Electron?

• A subatomic particle that has a positive charge
• A subatomic particle that has a negative charge (found outside of the nucleus.)
• A subatomic particle that has no charge and that is found in the nucleus of an atom
• A subatomic particle that is found inside the nucleus

What does the atomic number of an element represent?

• Number of electrons in an atom
• Number of protons in an atom
• Total number of particles in an atom
• Mass of the atom

Different elements have __________ atomic numbers.

• Similar
• Identical
• Different
• Varied

Oxygen atoms contain 8 protons, so its atomic number is ______.

• 6
• 7
• 8
• 9

Neutral atoms have the same number of electrons as protons.

• True
• False

Can atoms of the same element have different numbers of neutrons?

• Yes
• No