Isotopes

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

Isotopes of an element have different...

• protons, electrons, and atomic mass
• protons, electrons, and atomic number
• neutrons and electrons
• neutrons and atomic mass

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

How many neutrons in C-14?

• 6
• 7
• 14
• 8

Which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Isotopes are atoms of the same element with different numbers of __________ and therefore different __________.

• neutrons ;  atomic numbers
• protons ; atomic masses
• electrons ; atomic masses
• neutrons; atomic masses

Which two are isotpes of element X?    
a. ⁷⁷₃₅X 
b. ⁷⁷₃₃X 
c. ⁸¹₃₇X 
d. ⁸¹₃₅ X

• a. and b.
• c. and d.
• a. and d.
• a. and c.

Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.

• 204
• 206
• 207
• 208