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WorksheetsUnit 1 Atomic Theory - Part II - Most Missed Questions Review
Total questions: 10
Worksheet time: 5mins
Which of the following explanations BEST describes how an atom emits color?
Electrons jump to higher energy levels and specific wavelengths are emitted as the electrons return to the ground state.
Electrons jump to higher energy levels and specific wavelengths are emitted as the electrons move to the excited state.
Protons jump to higher energy levels and specific wavelengths are emitted as the electrons return to the ground state.
Protons jump to higher energy levels and specific wavelengths are emitted as the electrons move to the excited state.
Use the information to answer the following question.
What is the identity of the unknown element and why is the color emitted?
Strontium, because electrons move from ground state to excited state to emit light.
Strontium, because as electrons fall back from an excited state to ground state, they emit light.
Potassium, because electrons move from a ground state to an excited state to emit light
Potassium, because as electrons fall back from an excited state to ground state, they emit light
If n = 3, l = 1 and the element has three valence electrons, what element is this?
Boron
Aluminum
Lithium
Phosphorous
When an anion forms:
A metal has gained electrons
A non-metal has gained electrons
A metal has lost electrons
A non-metal has lost electrons
Air is composed of nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and argon (Ar). How is air categorized?
Element
Homogeneous Mixture
Compound
Heterogeneous Mixture
Why did scientists place Helium in group #8?
Helium has 8 valence electrons
Helium has 8 total electrons
Helium is a metal
Helium has a full outer energy level
What is the result of the formation of every ion?
A stable octet of electrons
Fusion of atoms
A neutral atom
Formation of a new isotope
Use the information to answer the following question.
The element iridium (Ir) has two naturally occurring isotopes, Iridium-191 (191 amu) and Iridium-193 (193 amu). The average atomic mass of iridium listed on the periodic table is 192.2 amu.
Which naturally occurring isotope, iridium-191 or iridium-193, is the MOST abundant?
Iridium-191 because it has a lower mass
Iridium-193 because it has a greater mass
Iridium-191 because the average atomic mass of the element is closer to its mass
Iridium-193 because the average atomic mass of the element is closer to its mass
What is a possible identity for this element and its electron configuration based on the orbital diagram?
When an cation forms:
A metal has gained electrons
A metal has lost electrons
A non-metal has gained electrons
A non-metal has lost electrons
