Long Quiz in Science 9

Which orbital designation has the highest energy?

• 2p

• 2s

• 3d

• 4s

The symbol “n” in the Bohr theory of atomic structure refers to _______.

• the energy of electron

• the orbit in which an electron is found

• the total energy of the atom

• the number of electrons in an energy level

How many electrons occupy the 3d orbitals in atoms when it is completely filled?

• 2

• 3

• 6

• 10

What kind of bond will result when two identical non-metallic atoms combine?

• ionic bond

• metallic bond

• non metal bond

• covalent bond

Why do atoms react with one another to form chemical bonds?

• to attain stability

• to produce ions

• to form molecules

• to form compounds

Who proposed the nuclear model of the atom?

• Bohr

• Dalton

• Rutherford

• Schrödinger

Which model explains electron behavior using waves?

• Quantum mechanical model

• Planetary model

• Plum pudding model

• Solid sphere model

The modern atomic model is based on:

• Classical mechanics

• Quantum mechanics

• Planetary motion

• Chemical bonding

Who introduced the concept of electron clouds?

• Bohr

• Schrödinger

• Dalton

• Rutherford

Quantum numbers describe:

• Atomic mass

• Electron properties and behavior

• Number of neutrons

• Chemical symbols