Exploring the World of Electrons and Their Configurations

Who first published a paper on the periodicity of elements before Mendeleev's periodic table?

• Erwin Schrodinger

• John Newlands

• John Dalton

• Niels Bohr

What concept did Niels Bohr introduce to describe energy levels?

• Wave-particle duality

• Electron shells

• Orbitals

• Quanta

Electrons are better described as:

• Neither particles nor waves

• Both particles and waves

• Waves

• Particles

What does the first electron shell of an atom contain?

• An s-orbital

• A d-orbital

• A p-orbital

• A f-orbital

What rule describes the desire for most lighter elements to have 8 electrons in their outer shell?

• The quantum rule

• Bohr's rule

• The octet rule

• Dalton's rule

What analogy is used to describe the behavior and arrangement of electrons?

• A dance

• A musical composition

• A novel

• A painting

Which orbital is added in the third electron shell?

• A p-orbital

• A d-orbital

• An f-orbital

• An s-orbital

What does the electron configuration of iron start with?

• 1s2

• 2s2

• 3s2

• 4s2

What is ionization energy?

• Energy to move an electron within an orbital

• Energy to change electron spin

• Energy to add an electron

• Energy to remove an electron

What fundamental concept is described by orbitals?

• Existence

• Magnetism

• Gravity

• Chemical bonding