Electrons and Periodicity

What happens when an electron relaxes back to its ground state (closer to the nucleus)?

• absorbs a quantum of energy

• emits a quantum of energy

• remains at the same energy level

• moves to a higher energy level

Tags

NGSS.HS-PS4-3

What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p, 4s?

• 2s

• 3d

• 3s

• 3p

Tags

NGSS.HS-PS1-1

What is the number of electrons in the outermost energy level of a chlorine atom?

• 1

• 2

• 3

• 7

Tags

NGSS.HS-PS1-1

What is the electron configuration of magnesium?

• 1s²2s²2p⁶3s²

• 1s²2s²2p⁶3s²3p⁶4s²

• 1s²2s²2p⁶3s²3p³

• 1s²2s²2p⁶3s²3p⁶4s¹

Tags

NGSS.HS-PS1-1

When does an atom emit light?

• when an electron moves from a lower to a higher energy level

• when an electron relaxes back to its ground state

• when an electron drops from a higher to a lower energy level

• when an electron moves to a higher energy level

Tags

NGSS.HS-PS4-3

The atomic emission spectra of a beryllium atom on Earth and of a beryllium atom in the sun would be

• the same

• different

• similar

• opposite

Tags

NGSS.HS-ESS1-2

This element is in the same period as nitrogen.

• oxygen

• chlorine

• gallium

• strontium

Tags

NGSS.HS-PS1-1

Each period in the periodic table corresponds to

• atomic mass

• principle energy level

• atomic radius

• atomic weight

The majority of elements are

• metals

• nonmetals

• metalloids

• noble gases

The atomic number of an element corresponds to which particles in the nucleus of an atom?

• protons

• neutrons

• electrons

• ions