The diagram above represents two electrons with 

• a. opposite spins.

•  b. the same spin.

• c. different energies.

• d. different energy levels.

Which electron configuration belongs to Chlorine (Cl)?

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁷

Tags

NGSS.HS-PS1-1

How many electrons can the d subshell hold?

• 2

• 6

• 10

• 14

Which is a correct statement about atoms of Na and Li?

• Na is larger than Li because Na has more protons and electrons.

• Na is larger than Li because Na has valence electrons that are farther away from the protons.

• Li is smaller than Na because Li has less protons and electrons than Na

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Rutherford concluded from his experiments that

• all the positive charge of an atom is concentrated in the center.

• positive charge is spread evenly throughout an atom.

• electrons orbit the positively charged nucleus.

• two of the above

Tags

NGSS.HS-PS1-8

The scientist who developed atomic theory was D__________.

Tags

NGSS.HS-PS1-7

Which statement about energy levels is false?

• They are located at fixed distances from the nucleus of the atom.

• They are the only places where electrons can be found.

• They have more energy when they are farther from the nucleus.

• They all have the same number of electrons.

What are orbitals?

• regions in the electron cloud where electrons are most likely to be

• fixed paths in which electrons orbit the nucleus

• places where electron waves are unstable

• none of the above

An electron emits energy when it jumps from

• proton to a neutron.

• electron cloud to an orbital.

• orbital to the atomic nucleus.

• higher energy level to a lower energy level.

Tags

NGSS.HS-PS4-3

How many electrons can there be in energy level 1?

• 0

• 1

• 2

• 3