Isotope and RAM Calculations

Question 1

What is an isotope?

Answer 1

An isotope is an atom with the same number of protons but a different number of neutrons.

Question 2

True or False: Isotopes of an element have different chemical properties.

Answer 2

False: Isotopes of an element have the same chemical properties.

Question 3

What does RAM stand for in chemistry?

Answer 3

Relative Atomic Mass.

Question 4

Fill in the blank: The RAM of an element is calculated based on the __________ of its isotopes.

Answer 4

weighted average mass.

Question 5

How do you calculate the RAM of an element with multiple isotopes?

Answer 5

Multiply the mass of each isotope by its relative abundance, sum the results, and divide by the total abundance.

Question 6

What is the RAM of Carbon-12?

Answer 6

12.

Question 7

True or False: The RAM of an element is always a whole number.

Answer 7

False: The RAM can be a decimal value.

Question 8

Fill in the blank: Isotopes are identified by their __________.

Answer 8

mass number.

Question 9

Calculate the RAM of an element with two isotopes: Isotope A (mass = 10, abundance = 75%) and Isotope B (mass = 12, abundance = 25%).

Answer 9

10.5.

Question 10

What is the mass number of an isotope?

Answer 10

The sum of the number of protons and neutrons in the nucleus.

Question 11

Fill in the blank: The relative abundance of isotopes is usually expressed as a __________.

Answer 11

percentage.