Exploring Atomic Structure and Isotopes

What are the three main subatomic particles in an atom?

• Protons, Photons, Neutrons

• Protons, Neutrons, Electrons

• Protons, Neutrons, Quarks

• Electrons, Neutrons, Positrons

What is the relative mass of a proton compared to a neutron?

• The relative mass of a proton compared to a neutron is approximately 1:1.

• The relative mass of a proton is 1:2 compared to a neutron.

• The relative mass of a proton is twice that of a neutron.

• The relative mass of a proton is half that of a neutron.

What is the charge of an electron?

• 0 coulombs

• -1.602 x 10^-19 coulombs

• -1 coulombs

• +1.602 x 10^-19 coulombs

Define atomic (proton) number.

• The atomic (proton) number is the number of protons in the nucleus of an atom.

• The atomic number is the total number of electrons in an atom.

• The atomic number is the mass of an atom measured in atomic mass units.

• The atomic number is the number of neutrons in the nucleus of an atom.

What does mass number represent in an atom?

• The mass number indicates the atomic charge of an atom.

• The mass number represents the total number of protons and neutrons in an atom.

• The mass number represents the total number of protons only.

• The mass number is the number of electrons in an atom.

How do you calculate the number of neutrons in an atom?

• Neutrons = Atomic Number - Atomic Mass Number

• Neutrons = Atomic Number + Atomic Mass Number

• Neutrons = Atomic Mass Number / Atomic Number

• Neutrons = Atomic Mass Number - Atomic Number

What is an isotope?

• An isotope is a variant of an element with the same number of protons but different numbers of neutrons.

• An isotope is a particle that has no protons or neutrons.

• An isotope is a type of molecule that contains only one neutron.

• An isotope is an element with different numbers of protons and neutrons.

How does a mass spectrometer work?

• It measures the temperature of substances to determine their composition.

• It separates substances based on their physical state, like solid or liquid.

• A mass spectrometer analyzes the mass-to-charge ratio of ions to identify and quantify substances.

• A mass spectrometer uses light waves to analyze the color of substances.

What information can you deduce from a mass spectrum?

• The pH level of the solution

• The boiling point of the substances

• The color of the compounds

• The mass-to-charge ratio of ions, molecular weight, and structural information of compounds.

How do you calculate the relative atomic mass from isotopic abundances?

• Relative atomic mass = (average mass of all isotopes)

• Relative atomic mass = (Σ(mass of isotope + fractional abundance))

• Relative atomic mass = (Σ(mass of isotope * fractional abundance))

• Relative atomic mass = (mass of most abundant isotope)