Nitrogen Isotopes and Atomic Structure

The video tutorial explains how to write isotope notation for nitrogen, also known as nuclear or isotopic notation. It introduces hyphen notation, where the element's name or symbol is followed by its mass number. The video discusses the two primary isotopes of nitrogen, nitrogen-14 and nitrogen-15, and explains how to write their isotopic notation by using the element symbol, mass number, and atomic number. The tutorial also covers the concept of atomic neutrality and how to calculate the number of neutrons using the mass number and atomic number.

What is the term used for the number that follows the element name in hyphen notation?

• Proton number

• Isotope number

• Mass number

• Atomic number

Which isotope of nitrogen is more abundant in nature?

• Nitrogen-12

• Nitrogen-13

• Nitrogen-14

• Nitrogen-15

What does the average atomic mass of nitrogen being close to 14 indicate?

• Nitrogen-13 is more abundant

• Nitrogen-12 is more abundant

• Nitrogen-14 is more abundant

• Nitrogen-15 is more abundant

What is the atomic number of nitrogen?

• 8

• 7

• 6

• 5

What is the symbol for nitrogen in isotopic notation?

• N

• Ne

• Ni

• Na

In isotopic notation, what does a zero written at the top right of the symbol indicate?

• The element is neutral

• The element is an ion

• The element has a positive charge

• The element has a negative charge

How many protons does nitrogen always have?

• 8

• 7

• 6

• 5

What is the mass number for the isotope nitrogen-15?

• 17

• 16

• 15

• 14

How can you determine the number of neutrons in an isotope?

• Subtract the atomic number from the mass number

• Add the atomic number to the mass number

• Divide the mass number by the atomic number

• Multiply the atomic number by the mass number

Why is it not necessary to write the number of neutrons in isotopic notation?

• Because it can be calculated from the mass and atomic numbers

• Because it is always zero

• Because it is the same as the atomic number

• Because it is the same as the mass number