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General Biology

Study Pack

Set 2 Atoms And Molecules

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Question 1

(Multiple Choice)

Free
Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers from 92-100. Based on this information, which of the following is also true of molybdenum?

A) Molybdenum atoms can have between 50 and 58 neutrons.
B) Molybdenum atoms can have between 50 and 58 protons.
C) Molybdenum atoms can have between 50 and 58 electrons.
D) Isotopes of molybdenum have different numbers of electrons.

Answer

Question 2

(Multiple Choice)

Free
  How many electrons are present in the neutral atom represented in the Periodic Table block in the figure? A) 18 B) 19 C) 22 D) 40 How many electrons are present in the neutral atom represented in the Periodic Table block in the figure?

A) 18
B) 19
C) 22
D) 40

Answer

Question 3

(Multiple Choice)

Free
What element does not react with other elements?

A) hydrogen
B) helium
C) oxygen
D) silicon

Answer