Study Biology

Course

Introductory Biology

Study Pack

Set 2 Basic Chemistry Of Cells

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Question 1

(Multiple Choice)

Free
Which factor determines whether an atom will be chemically reactive?

A)the number of electrons in the outer shell
B)the ratio of protons to electrons
C)the number of electrons in the inner shell
D)the ratio of protons to neutrons
E)the number of electron shells an atom has

Answer

Question 2

(Multiple Choice)

Free
This diagram shows that two oxygen atoms interact A)to form one covalent bond. B)to form two covalent bonds. C)to form four covalent bonds. D)to form an ionic bonD. E)to form hydrogen bonds.
This diagram shows that two oxygen atoms interact

A)to form one covalent bond.
B)to form two covalent bonds.
C)to form four covalent bonds.
D)to form an ionic bonD.
E)to form hydrogen bonds.

Answer

Question 3

(Multiple Choice)

Free
A chemist found one atom with 9 protons,8 neutrons and 7 electrons.Another atom has 8 protons,9 neutrons and 10 electrons.Which of the following statements is correct?

A)Both atoms have the same mass number.
B)Both atoms have -2 electrical charge.
C)Both atoms are isotopes of the same element.
D)Both atoms are chemically non-reactive and would not interact with other atoms.
E)Both atoms have fulfilled the octet rulE.

Answer