Atoms Flashcards
The definition of a atomic number is
A. The number of electrons in an atom
B. The no. Of protons and neutrons in a atoms
C. The no. Of protons
E. None of these
C
The definition of atomic mass is
A. The number of protons plus neutrons in an atom
B. The number of electrons in an atom.
C. The number of protons in an atom.
D. The number of protons equals the number of electrons.
E. None of these.
A
The definition of a neutral or uncharged atom is
A. The number of protons plus neutrons in an atom.
B. The number of electrons in an atom.
C. The number of protons in an atom
D. The number of protons equals the number of electrons.
E. None of these.
D
An atom is defined as
A. Smallest unit of element made up of some atomic particles.
B. Smallest unit of energy.
C. Total number of protons.
D. Total number of electrons.
E. A substance that dissolves in other substances.
A
All of these are common elements in living organisms except
A. Nitrogen.
B. Carbon.
C. Oxygen.
D. Sodium.
E. Hydrogen.
D
Which of these are not a compound?
A. Oxygen.
B. Water.
C. Salt.
D. Methane.
E. Glucose.
A
Ions with opposite charges attract to form what bonds
A. Covalent.
B. Metallic.
C. Ionic.
D. Hydrogen.
E. Polar.
C
Atoms share pairs of electrons to form blank bonds
A. Ionic.
B. Hydrogen.
C. Covalent.
D. Metallic.
E. Vander walls.
C
Polar molecules attract each other to form blank bonds
A. Covalent.
B. Ionic.
C. Hydrogen.
D. Metallic.
E. Vanderwal’s.
C
Atoms do not share electrons equally in blank bonds
A. Ionic.
B. Covalent.
C. Polar covalent.
D. Non-polar covalent.
E. Hydrogen.
C
Which of these is not a special property of water?
A. It floats when it’s solid.
B. It’s cohesive.
C. It’s a good solvent.
D. Moderate temperature.
E. It contains salt.
E
Solid water floats a top liquid water because
A. Ice is denser than liquid water.
B. Ice molecules are more tightly packed than in liquid water.
C. The temperature difference creates buoyancy.
D. Ice is repelled by water molecules.
E. Water expands when it freezes, making ice less dense than liquid water Or hydrogen bonding causes, I used to have an open less dense structure.
E
Your body temperature stays consistent because
A. Water moderate temperature.
B. The body does not generate or lose heat
C. Enzymes prevent temperature changes.
E. The body’s temperature is controlled by external factors.
A.
