Isotope EQ Review

True or False: For a neutral (uncharged) atom, the number of electrons is equal to the number of protons.

• True
• False

Which of the following is NOT a way to symbolize an isotope?

• Element-mass number (ex. Helium-4)
• Symbol-atomic number (ex. He-2)
• Symbol-mass number (ex.He-4)

True or False: There are 86 electrons in an (uncharged) atom of Sr-86

• True
• False

In the isotope B-11, what does the 11 represent?

• Atomic Number
• Mass Number
• Average atomic mass

Which isotope has a mass number of 14 and 8 neutrons?

• N-14
• O-18
• C-14

An unknown isotope contains 15 protons, 15 electrons, and 17 neutrons. What is the identity of this unknown isotope?

• P-15
• P-17
• P-32

A neutral atom of Cl-37 has ______.

• 37 protons, 37 neutrons, and 37 electrons.

• 17 protons, 37 neutrons, and 17 electrons.

• 17 protons, 20 neutrons, and 17 electrons.

Tags

NGSS.MS-PS1-1

Isotopes of the same elements must have the same number of _______.

• Protons only
• Protons and electrons
• Neutrons only

Isotopes of the same element must have different numbers of _______.

• Protons
• Neutrons
• Electrons

How many neutrons are in an atom of Sr-86?

• 48
• 58
• 86

Tags

NGSS.MS-PS1-1