8.5B Protons and Electrons (Progress)

The table provides information on four different elements. Which element has six protons in its nucleus?

• Boron

• Carbon

• Nitrogen

• Oxygen

Tags

NGSS.MS-PS1-1

The atomic number of nickel is 28. This means that it has 28 -

• different isotopes.

• oxidation states.

• electron energy levels.

• protons in its nucleus.

Tags

NGSS.MS-PS1-1

The number of valence electrons in an atom determines its –

• atomic number.

• chemical reactivity.

• number of protons.

• atomic mass.

The table provides information on four elements. Based on the data provided, it can be concluded that -

• potassium is the best conductor.

• fluorine is the most reactive.

• magnesium has the most protons.

• boron has the greatest mass.

Which of the following distinguishes an element from all other elements?

• Its number of protons.

• Its color in solid form.

• Its phase at room temperature.

• Its group in the Periodic Table.