Bio 201
Question 1
Put these items in order of their size from the smallest to the largest
Answer Choices
oxygen, hydrogen, proton, electron, glucose molecule, water molecule , oxygen gas molecule, chlorine
Answer– electron, proton, hydrogen atom……. purchase below for full answer
Question 2
Match each description with the term that best relates to it.
Pure gold, with no traces of nickel or other metals in it.
The tiniest item that could still be considered to have all the properties of carbon.
Air is an example.
An electron is an example.
Answer Choices– matter, atom, subatomic particle, element
Question 3
Which of these would be the cause of radioactivity?
Answer an increase in the number of neutrons
Question 4
This question is all about elements and their valence shells. You will need to consult the periodic table to answer these questions.
An atom of oxygen (O) should have a total of [1] electrons. Therefore, there would be [2] electrons in its valence shell. The valence shell of oxygen is thus not filled and requires [3] more electrons to be complete. The valence shell in the atom of oxygen would be easier to have full if it [4] (gained or lost) electrons.
An atom of sodium (Na) should have a total of [5] electrons. Therefore, there would be [6] electrons in its valence shell. The valence shell of sodium is thus not filled and requires [7] more electrons to be complete. The valence shell in the atom of sodium would be easier to have full if it [8] (gained or lost) electrons.
An atom of carbon (C) should have a total of [9] electrons. Therefore, there would be [10] electrons in its valence shell. The valence shell of carbon is thus not filled and requires [11] more electrons to be complete.
An atom of phosphorus (P) should have a total of [12] electrons. Therefore, there would be [13] electrons in its valence shell. The valence shell of phosphorus is thus not filled and requires [14] more electrons to be complete.
An atom of nitrogen (N) should have a total of [15] electrons. Therefore, there would be [16] electrons in its valence shell. The valence shell of nitrogen is thus not filled and requires [17] more electrons to be complete.
An atom of hydrogen (H) should have a total of [18] electrons. Therefore, there would be [19] electrons in its valence shell. The valence shell of carbon is thus not filled and requires [20] more electrons to be complete.
Question 5
Match the subatomic particle or particles with the description.
The tiniest subatomic particle
The two subatomic particles that contribute to the atomic mass.
The number of these subatomic particles determines the elemental identity of any atom
This subatomic particle spins around in energy levels.
This subatomic particle has no electrical charge
These carry a negative electrical charge
Different isotopes of the same element have different numbers of this subatomic particle.
The number of these subatomic particles in the valence shell of an atom determines a great deal about the chemical reactivity of that atom
Answer choices
electron and Proton
neutron and proton
electron and neutron
neutron
electron
proton
