What is the charge of ions formed by alkali metals?

• 1+

• 2+

• 0

• 3+

Which group do alkaline earth metals belong to in the periodic table?

• Group 8A

• Group 1A

• Group 2A

• Group 7A

What is the role of an anode in a cathode ray tube?

• Reduction occurs

• Oxidation occurs

• It emits light

• It is negatively charged

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the smallest particle of an element that retains its chemical identity?

• Compound

• Ion

• Atom

• Molecule

How is the average atomic mass of an element calculated?

• Sum of protons and neutrons

• Weighted average of isotopes

• Number of electrons

• Number of protons

What does the atomic number of an element represent?

• Number of neutrons

• Number of isotopes

• Number of electrons

• Number of protons

Which element is not a diatomic molecule in nature?

• Oxygen

• Helium

• Nitrogen

• Fluorine

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

What is the term for an electron that has absorbed energy and moved to a higher energy level?

• Excited state

• Stable state

• Ground state

• Ionized state

What is the term for the vertical columns on the periodic table?

• Periods

• Groups

• Rows

• Blocks