What is the arrangement of electrons in an atom called?

• Atomic structure

• Electron configuration

• Nuclear arrangement

• Molecular configuration

How many energy levels can an atom have?

• An atom can have an infinite number of energy levels.

• An atom can have a fixed number of energy levels, typically eight.

• An atom can have a maximum of seven energy levels.

• An atom can have only two energy levels.

What are the regions around the nucleus where electrons are likely to be found?

• Protons

• Orbitals

• Neutrons

• Nuclei

Who proposed the first atomic theory?

• Niels Bohr

• Erwin Schrödinger

• John Dalton

• Albert Einstein

What does the Bohr model of the atom describe?

• The Bohr model states that electrons can exist anywhere around the nucleus.

• The Bohr model describes the atom as having electrons in fixed orbits around the nucleus.

• The Bohr model describes the atom as a solid sphere.

• The Bohr model suggests that atoms do not have a nucleus.

What is the maximum number of electrons in the first energy level?

• 8

• 1

• 2

• 18

What shape do s orbitals have?

• Cylindrical

• Triangular

• Spherical

• Hexagonal

What is the main idea of Dalton's atomic model?

• Matter is made up of indivisible atoms that combine in whole-number ratios.

• Matter is composed of elements that cannot be combined.

• Matter is made up of molecules that vary in size.

• Atoms can be divided into smaller particles.

How many electrons can the second energy level hold?

• 2

• 8

• 4

• 10

What is the shape of p orbitals?

• Dumbbell-shaped

• Spherical

• Linear

• Triangular