8CMU: Fast & Curious #2

An element's isotopes have different numbers of ___________.

• Protons

• Neutrons

• Electrons

• Atoms

Which answer completes the blanks? Positively charged ions are called ________, while negatively charged ions are called ________.

• ions, ions

• prions, elections

• cations, anions

• anions, cations

Almost all elements are stable when they have how many valence electrons?

• 2

• 4

• 8

• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which subatomic particle is responsible for the chemical properties of an element?

• Neutron

• Electron

• Proton

• Photon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom's mass number is the sum of which particles?

• protons and electrons

• protons and neutrons

• neutrons and electrons

• protons, neutrons, and electrons