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Could anyone please help with these questions? (Bio)

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Could anyone please help with these questions? (Bio)

Postby lindshastude » Tue May 01, 2012 3:50 pm

If anyone could please help I would greatly appreciate it! Thanks :D

Radioactive Isotopes
A. Are electrically unbalanced
B. Behave the same chemically and physically but differ biologically from other isotopes
C. Are the same physically and Biologically but differ from other isotopes
D. Have an excess number of Neutrons
E. Are produced when substances are exposed to radiation

Which is not a compound?
A. Salt
B. Carbohydrate
C. Carbon
D. Sugar
E. Methane

The negative subatomic particle is the
A. Neutron
B. Proton
C. Electron
D. A and B
E. B and C

The positive subatomic particle is the

A. Neutron
B. Proton
C. Electron
D. A and B
E. B and C

The Neutral subatomic particle is the
A. Neutron
B. Proton
C. Electron
D. A and B
C. None of these

The nucleus of an atom contains
A. Neutrons and Protons
B. Neutrons and Electrons
C. Protons and Electrons
D. Protons only
E. Neutrons only

The atomic weight of an atom is determined bu the weight of the
A. Neutrons and Protons
B. Neutrons and Electrons
C. Protons and Electrons
D. Protons only
E. Neutrons only

The atomic number of an atom is determined by the number of
A. Neutrons and Protons
B. Neutrons and Electrons
C. Protons and Electrons
D. Protons only
E. Neutrons only

All atoms of an element have the same number of
A. Ions
B. Protons
C. Neutrons
D. Electrons
E. Protons and Neutrons

A hydrogen bond is
A. A sharing of a pair of electrons between a hydrogen and an oxygen nucleus
B. A sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus
C. An attractive force that involves a hydrogen atom and an oxygen or a nitrogen atom that are either in 2 different molecules or within the same molecule
D. None of the above
E. All of the above

Magnesium has 12 protons. How many electrons in its 3rd energy level?
A. 2
B. 4
C. 6
D. 8
E. 10

What is formed when an atom loses or gains an electron?
A. Mole
B. Ion
C. Molecule
D. Bond
E. Reaction

Atoms of liquid mercury are strongly attracted to other atoms of liquid mercury because of the .?. between the mercury atoms
A. cohesion
B. adhesion
C. Ionic bonding
D. Polar covalent bonding

When 2 water molecules that are hydrogen bonded separate, occasionally one of the hydrogen atoms will be transferred, forming H30+ and OH- This is called the ____ of water
A. Reduction
B. Oxidation
C. Ionization
D. Hydrogenation

In pure water, the
A. ph is > 7
B. ph is < 7
C. Concentration of OH- = H+
D. Concentration of OH- < H+
E. Concentration of OH- > H+

Which of the following bonds requires the most energy to break (when in an aqueous solution?)
A. Covalent
B. Ionic
C. Hydrogen
D. van der WALLS

In order for water to become a vapor, there must be sufficient heat energy to
A. Break its hydrogen bonds
B. Break its covalent bonds
C. lower its specific heat
D. Raise its specific heat

The distance of an orbiting electron from its nucleus is directly related to the
A. distance from an atom from any other atom
B. energy level of the electron
C. name of the element to which the atom belongs
D. Number of protons in the nucleus
E. total number of protons in the nucleus

A covalent double bond could form between any of the following pairs of atoms except
A. carbon and another carbon
B. carbon and hydrogen
C. carbon and a nitrogen
D. carbon and an oxygen
E. oxygen and another oxygen

Because the water molecule has 2 distinct ends, each with a partial electrical charge, water is said to be
A. ionic
B. liquid
C. magnetic
D. neutralized
E. polar
lindshastude
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Postby JackBean » Wed May 02, 2012 7:06 am

Really? Such easy questions? BTW these are not biology, but chemistry :roll: (which is fine for me, since I'm rather chemist, but just to be clear...)

You could have problem with first question, since there is no clear answer, but the rest is pretty easy so show your work first.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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JackBean
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