Writing Symbols for Isotopes

The video tutorial explains isotopes, which are atoms of the same element with different numbers of neutrons and mass numbers. It covers two common notations for isotopes, including the mass number and atomic number, and discusses the net charge of isotopes. The tutorial provides examples using carbon isotopes and demonstrates how to calculate isotope symbols from given data, including protons, neutrons, and electrons. The video concludes with an advanced example and a summary of the key concepts.

What defines isotopes of the same element?

• Different atomic numbers

• Different number of electrons

• Different number of neutrons

• Different number of protons

How is the mass number of an isotope calculated?

• Neutrons plus electrons

• Protons plus electrons

• Atomic number plus electrons

• Protons plus neutrons

In the first common notation of isotopes, what does the number on the bottom represent?

• Mass number

• Atomic number

• Net charge

• Number of neutrons

What is the net charge of an isotope with 6 protons and 6 electrons?

• +1

• -1

• +2

• 0

What is the isotope symbol for an element with 6 protons, 6 neutrons, and a net charge of 0?

• C-12,6

• C-14,6

• C-13,6

• C-12,7

Tags

NGSS.MS-PS1-1

Given 7 neutrons and a mass number of 13, what is the atomic number?

• 7

• 6

• 5

• 8

Tags

NGSS.MS-PS1-1

If an isotope has 6 protons and 6 electrons, what is its net charge?

• +1

• -1

• 0

• +2

What is the mass number of an isotope with 6 protons and 8 neutrons?

• 14

• 13

• 15

• 12

For an isotope with a net charge of -1 and 6 protons, how many electrons does it have?

• 5

• 6

• 7

• 8

What is the isotope symbol for an element with 6 protons, 8 neutrons, and a net charge of -1?

• C-14,6,-1

• C-13,6,-1

• C-12,6,-1

• C-14,7,-1