Atoms & Isotopes

Using your Periodic Table, answer the following question: What is the atomic number of the element Barium?

• 5

• 35

• 56

• 137.327

Using your Periodic Table, answer the following question: How many protons does the element Barium have?

• 5

• 35

• 56

• 137.327

Using your Periodic Table, answer the following question: What is the symbol for the element Barium have?

• B

• Ba

• BA

• Br

Which of the following is the correct definition for isotopes?

• Atoms of the same element that have different number of neutrons

• Atoms of the same element that have different number of protons

• Atoms of the same element that have different number of electrons

• Atoms of different elements that have the same number of neutrons

The number of electrons in a neutral atom will always be equal to...

• the number of neutrons

• the number protons

• the mass number

• the number of neutrons plus the number of protons

The mass number is equal to...

• the number of neutrons

• the number protons

• the number of protons minus the number of neutrons

• the number of neutrons plus the number of protons

Consider this symbol for an isotope. What is the mass number for the isotope?

• 36

• 85

• 121

• 49

Consider this symbol for an isotope. How many protons does this isotope have?

• 36

• 85

• 121

• 49

Consider this symbol for an isotope. How many neutrons does this isotope have?

• 36

• 85

• 121

• 49

Which number is always the largest?

• the mass number

• the atomic number

• the number of neutrons

• the number of electrons