Quantum Theory

How many quantum numbers are needed to describe the energy state of an electron in an atom?

• 1
• 2
• 3
• 4

How many electrons can the first energy level hold?

• 1
• 2
• 8
• 0

The angular momentum quantum number indicates the

• orientation an orbital around the nucleus.
• shape of an orbital.
• direction of the spin of the electron in its orbital.
• main energy level of an orbital.

An electron fro which n=4 has more ____ than an electron for which n=2.

• spin
• particle nature
• energy
• wave natrue

The distance traveled between two successive peaks of a waves is the

• speed
• frequency
• wavelength
• energy

Tags

NGSS.HS-PS4-1

If electrons in an atom have the lowest possible energies, the atom is in the

• ground state.
• inert state.
• excited state.
• radiation-emitting state.

To excite an atom, there needs be...

• Absorption of energy

• Emission of energy

• Movement of electrons

• A proton

When an electron transitions from a higher energy level to a lower energy level....

• The electron collapse to the nucleus

• The electron loses all its energy

• Light is emitted

• Light is absorbed by the protons

Tags

NGSS.HS-PS1-4

As an electron gets closer to the nucleus the ...........to the nucleus gets..........

• attraction; weaker

• attraction; stronger

• repulsion; weaker

• repulsion; stronger

Consider the transition of n=5 to n=2 on the Bohr model of the hydrogen atom. This electron transition ____ energy.

• Release

• Absorbs

Tags

NGSS.HS-PS4-3