Today, we had a classroom activity in which groups were formed to answer the questions below. Each student is responsible for knowing the answers to each of these questions. The answers for these questions can be found in the textbook through pgs. 110-113. Let me know if you have any questions!
Atomic Number
-What does atomic number mean?
The number of protons in an element.
-How is the atomic number found on the periodic table?
At the top of the symbol for the element.
-How is atomic number related to the number of subatomic particles in an atom?
The number of protons. And because protons are positive, there needs to be negative charges to cancel them out. So the number of electrons are the same as the number of protons.
-Give an example to explain.
Hydrogen has an atomic number of 1. That means that there is 1 proton and 1 electron in a hydrogen atom.
Mass Number
-What does mass number mean?
The total number of protons and neutrons in an element.
-How is mass number found?
The mass number is found by adding the number of protons and the number of neutrons together.
-How does mass number relate to the number of subatomic particles in an atom?
Indicates the total number of protons and neutrons.
-Give an example to explain.
Neon has a regular mass number of 20 and an atomic number of 10. That means that there are 10 protons and 10 neutrons (they add together to equal 20).
Isotope
-What is an isotope?
An isotope is an atom of an element with the same number of protons and different number of neutrons.
-How is the isotope of one element the same and/or different?
Same number of protons and electrons, different number of neutrons and different mass.
-Draw some nuclei of different isotopes of the same element.
See pg. 113.
Nuclear Atom
-What is the shorthand way to express the atomic number and mass number of the nuclear atom?
See below
-What is the shorthand way to express those two numbers for an isotope?
See below
Try filling out the isotope chart below!
Atomic Number
-What does atomic number mean?
The number of protons in an element.
-How is the atomic number found on the periodic table?
At the top of the symbol for the element.
-How is atomic number related to the number of subatomic particles in an atom?
The number of protons. And because protons are positive, there needs to be negative charges to cancel them out. So the number of electrons are the same as the number of protons.
-Give an example to explain.
Hydrogen has an atomic number of 1. That means that there is 1 proton and 1 electron in a hydrogen atom.
Mass Number
-What does mass number mean?
The total number of protons and neutrons in an element.
-How is mass number found?
The mass number is found by adding the number of protons and the number of neutrons together.
-How does mass number relate to the number of subatomic particles in an atom?
Indicates the total number of protons and neutrons.
-Give an example to explain.
Neon has a regular mass number of 20 and an atomic number of 10. That means that there are 10 protons and 10 neutrons (they add together to equal 20).
Isotope
-What is an isotope?
An isotope is an atom of an element with the same number of protons and different number of neutrons.
-How is the isotope of one element the same and/or different?
Same number of protons and electrons, different number of neutrons and different mass.
-Draw some nuclei of different isotopes of the same element.
See pg. 113.
Nuclear Atom
-What is the shorthand way to express the atomic number and mass number of the nuclear atom?
See below
-What is the shorthand way to express those two numbers for an isotope?
See below
Try filling out the isotope chart below!