Isotopes

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

How many neutrons does the isotope of lithium have?

• 8

• 3

• 4

• 5

How many protons does this isotope of titanium have?

• 48

• 22

• 26

• 70

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

• number of neutrons

• atomic number

• number of electrons 

• mass number

which atom has  4 neutrons?

• Li-6

• Li-7

• Li-8

• they have the same # of neutrons

How many neutrons in C-14?

• 6

• 7

• 14

• 8

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

• n⁰ ;  atomic #’s

• p⁺ ; atomic #’s

• e^- ; atomic masses

• n⁰ ; atomic masses

How many neutrons does the isotope below have?     ⁸⁹ ₃₆Kr

• 53

• 36

• 89

• 125

If X is the symbol for an element, which of the following two symbols represent    isotopes of the same element?     I. ⁷⁷₃₅X  II. ⁷⁷₃₃X  III. ⁸¹₃₇X  IV. ⁸¹₃₅ X

• I and II

• III and IV

• I and IV

• I and III

An atom is electrically neutral when

• protons and neutrons are the same

• protons and electrons are the same

• neutrons and electrons are the same

• neutrons balance the protons and electrons