Electrons in Atoms

The lowest energy state of an atom

• excited state

• ground state

• frequency

• wavelength

What atom matches this electron configuration?

1s² 2s² 2p⁶ 3s²3p⁴

• sodium

• sulfur

• silicon

• potassium

Tags

NGSS.HS-PS1-1

For an electron to change from ground state to an excited stated it must...

• Absorb energy

• Release energy

Tags

NGSS.HS-PS1-2

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level.

•    jumps from a lower to a higher energy level.   

•    moves within its atomic orbital.

• falls into the nucleus.

Tags

NGSS.HS-PS1-2

According to the Bohr model, what happens when an electron moves to a higher energy level?

• It releases energy.

• It absorbs energy.

• It becomes a proton.

• It remains at the same energy level.

How many electrons in a neutral lithium atom?

• 3

• 7

• 4

• 1

Tags

NGSS.HS-PS1-1

In the Bohr model of the atom, electrons are described as:

• Orbiting the nucleus in fixed paths

• Randomly scattered around the nucleus

• Stationary within the nucleus

• Moving in elliptical orbits

Which of the following elements has a full valence shell in its ground state?

• Helium

• Lithium

• Carbon

• Oxygen

Tags

NGSS.HS-PS1-1

How many electrons does a neutral atom with 14 protons and 16 neutrons have?

Mathematical Equivalence

ON

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

Tags

NGSS.HS-PS1-2