FREE BIOLOGY AND STUDY GAMES ABOUT MASTERING

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FREE BIOLOGY AND STUDY GAMES ABOUT MASTERING

BIOLOGY2 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -6 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: In the term trace element, the adjective trace means that

Answer:

the element is required in very small amounts.

Question 2: Which statement is true of all atoms that are anions?

Answer:

The atom has more electrons than protons

Question 3: The reactivity of an atom arises from

Answer:

the existence of unpaired electrons in the valence shell

Question 4: Compared with 31^P, the radioactive isotope 32^P has

Answer:

one more neutron

Question 5: The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound.

Answer:

H_2S Question 6: We can represent atoms by listing the number of protons, neutrons, and electrons-for example, 2p+, 2n0, 2e- for helium. What represents the 18^O isotope of oxygen?

Answer:

8p+, 10n0, 8e-