Biology Test 2 Part 1
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Goes over test of biology test 2 in part 1
- 1.CHNOPS are
- A.
The only atoms found in nonliving and living things
- B.
The only atoms found in living things.
- C.
Atoms basic to life.
- D.
Atoms found in rocks.
- E.
The only atoms found in nonliving and living things,as well as atoms basic to life.
- 2.Which of the following is not a component of an atom?
- A.
Proton
- B.
Neutron
- C.
Lectons
- D.
Electron
- 3.The atomic number tells you the
- A.
Number of neutrons in the nucleus.
- B.
Number of protons in the atom.
- C.
Atomic mass of the atom.
- D.
Number of its electrons if the atom has a neutral charge.
- E.
Number of protons in the atm, as well as number of its electrons if the atom has a neutral charge.
- 4.Which of the subatomic particles contributes almost no weight to an atom?
- A.
Protons in the electron shells
- B.
Electrons in the nucleus
- C.
Neutrons in the nucleus
- D.
Electrons at various energy levels
- 5.Isotopes of the same element differ from each other only by the number of neutrons.
- A.
True
- B.
False
- 6.The periodic table does not
- A.
Give information about the various elements.
- B.
Indicate the number of protons and the number of valence electrons.
- C.
Indicate whether an elements forms ionic or covalent bonds.
- D.
A useful role in chemistry today. Atoms React with One Another to Form Molecules
- 7.The rule stating that the outer electron shell is most stable when it contains eight electrons is the
- A.
Stability rule.
- B.
Octet rule.
- C.
Atomic rule.
- D.
Shell rule.
- 8.How many electrons does nitrogen require to fill its outer shell?
- A.
0
- B.
2
- C.
1
- D.
3
- 9.When an atom gains electrons, it
- A.
Forms a negatively charged ion.
- B.
Forms a positively charged ion
- C.
Forms covalent bonds.
- D.
Gains atomic mass.
- 10.An atom that has two electrons in the outer shell, such as calcium, would most likely
- A.
Share to acquire a completed outer shell.
- B.
Lose these two electrons and become a negatively charged ion.
- C.
Lose these two electrons and become a positively charged ion.
- D.
Bind with carbon by way of hydrogen bonds
- E.
Bind with another calcium atom to satisfy its energy needs.
- 11.Molecules held together by _______ bonds tend to dissociate in biological systems due to the water content in those systems.
- A.
Covalent
- B.
Hydrogen
- C.
Ionic
- D.
Nitrogen
- 12.Which type of bond results from the sharing of electrons between atoms?
- A.
Covalent
- B.
Hydrogen
- C.
ionic
- D.
Neutral
- 13.In the molecule CH4,
- A.
All atoms have eight electrons in the outer shell.
- B.
All atoms are sharing electrons.
- C.
Carbon could accept more hydrogen atoms.
- D.
All of these are correct.
- 14.In which of these are the electrons always shared unequally?
- A.
Double covalent bond
- B.
Polar covalent bond
- C.
Triple covalent bond
- D.
Ionic and covalent bonds
- E.
Hydrogen bond
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