What are isotopes?

• same elements with different charges

• same elements with different atomic mass

• same number of neutrons with different atomic mass

• same number of protons with different atomic number

How many protons does Mg⁺² have?

• 10

• 12

• 14

• 24

How many electrons does N^-3 have?

• 4

• 7

• 10

• 14

Which one is TRUE about the figure?

• it has a charge of -1

• it has a charge of +1

• it is a neutral atom

• it is an isotope

Which among the following is included in a nuclide symbol?

• number of protons

• number of neutrons

• number of electrons

• none of the other choices

Which one is TRUE about the figure?

• it is a neutral atom

• it is an ion

• it is an isotope

• it is both an ion and an isotope

Which one is TRUE about the figure?

• Mg

• C

• C12-isotope

• C^-1

Which one is TRUE about the figure?

• Ne^-2

• Ne⁺²

• O^-2

• O⁺²

Which one is TRUE about the figure?

• it has 10 neutrons

• it has 5 electrons

• it has 4 electrons

• it has 6 electrons

Which one is TRUE about the figure?

• it is a neutral Lithium atom

• it is an isotope

• it has a charge of -1

• its atomic mass is 6