Chem The Atom Review

Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this atom have

• less energy and the same charge

• less energy and a different charge

• more energy and the same charge

• more energy and a different charge

Tags

NGSS.HS-PS1-1

Base your answer on the bright-line spectra produced by four elements and the spectrum of a mixture of elements represented in the diagram.

Each line in the spectra represents the energy

• absorbed as an atom loses an electron

• absorbed as an atom gains an electron

• released as an electron moves from a lower energy state to a higher energy state

• released as an electron moves from a higher energy state to a lower energy state.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

Which elements are present in the mixture?

• D and A

• D and Z

• X and A

• X and Z

Which electron transition in an excited atom results in a release of energy?

• first shell to the third shell

• second shell to the fourth shell

• third shell to the fourth shell

• fourth shell to the second shell

A specific amount of energy is emitted when excited electrons in an atom in a sample of an element return to the ground state. The emitted energy can be used to determine the

• mass of the sample

• volume of the sample

• identity of the element

• number of moles of the element

Tags

NGSS.HS-PS1-4

During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms

• are lost by the atoms

• are gained by the atoms

• return to lower energy states within the atoms

• move to higher energy states within the atoms

Tags

NGSS.HS-PS1-2

What must occur when an electron in an atom returns from a higher energy level state to a lower energy state?

• A specific amount of energy is released.

• A random amount of energy is released.

• The atom undergoes transmutation.

• The atom spontaneously decays.

Tags

NGSS.HS-PS1-4

The isotopes K-37 and K-42 have the same

• decay mode

• bright-line spectrum

• mass number of their atoms

• total number of neutrons in their atoms

Tags

NGSS.HS-PS1-8

What is the total number of valence electrons in an atom of germanium in the ground state?

• 8

• 2

• 14

• 4

Tags

NGSS.HS-PS1-1

What is the electron configuration of a sulfur atom in the ground state?

• 2-4

• 2-6

• 2-8-4

• 2-8-6

Tags

NGSS.HS-PS1-1