2022 ~ Atomic Structure QUIZ #2 PRACTICE

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 the isotope of lithium have?

• 8
• 3
• 4
• 5

Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.

• true
• false

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

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

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

which atom has  4 neutrons?

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

What is the name of the atom pictured here?

• Nitrogen
• Nitrogen-15
• Nitrogen-7
• Nitrogen-8

How many neutrons are there in one atom of magnesium?

• 12

• 6

• 24

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion