Isotopes 1st day

What is an isotope? 

• A charged atom
• An atom with different amounts of neutrons
• An atom with different amounts of protons
• A neutral atom

How many neutrons does a Sodium 24 isotope have?

• 12
• 13
• 14
• 15

How many neutrons does a Carbon 13 atom have?

• 6
• 5
• 7
• 8

What is the name of the pictured isotope?

• Carbon-12
• Carbon-13
• Carbon-14
• Carbon-15

What do carbon-12 and carbon-14 have in common?

• they have same number of protons
• they have the same number of neutrons
• they have the same atomic mass
• they have the same atomic weight

What can you conclude about carbon-14 from its name?

• It has 14 electrons
• it has 14 neutrons
• it has 14 protons
• it has an atomic mass of 14 u

Which of the following is the isotope of Magnesium with 12 protons and 13 neutrons?

• Mg-12

• Mg-13

• Mg-25

• Mg-24.305

Most of an atom's mass is found in the

• electrons.
• nucleus.

Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.

• neutrons ; atomic numbers

• protons ; atomic numbers

• electrons ; mass numbers

• neutrons ; mass number

How many neutrons does an atom of the isotope Neon-22 have?

• 12
• 10
• 22
• 20