Lesson: Identifying Atoms, Isotopes, and Ions

Lesson: Identifying Atoms, Isotopes, and Ions

By William Lovering

Multiple Choice

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Multiple Choice

What is the atomic number of this atom?

• 2
• 4
• 6
• none of the above

Multiple Choice

Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?

• it has 9 protons
• it weighs 9 grams
• it has 9 electron shells
• it has a boiling point of 9 degree celsius

Multiple Choice

An atom of fluorine has an atomic mass of 19 u. Keeping in mind that its atomic number is 9, what can you infer about this atom?

• it has 9 neutrons
• it has 10 electrons
• it has 10 neutrons
• it has 10 protons

Multiple Choice

If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, its atomic mass is:

• 16
• 32
• 48
• 64

Multiple Choice

The electrons in the cloud have higher probabilities of existing in areas called

• orbitals

• nuclei

• subatomic space

• silos

Multiple Choice

Electrons orbit the nucleus like planets orbiting a star.

• True

• False

Multiple Choice

Valence electrons are the...

• Innermost electrons
• Middle electrons
• Outermost electrons
• Any electrons

Multiple Choice

• 7
• 8
• 9
• 10

Multiple Choice

• 2
• 8
• 3
• 13

Multiple Choice

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

• 2

• 4

• 6

• 8

• 10