I REALLY NEED HELP!!!
elements differ from one another based on the number of
atoms
electrons
neutrons
protons
neutrons carry a negative charge.
true
false
which type of chemical bond involves atoms losing or gaining electrons?
covalent
hydrogen
ionic
metallic
Which type of bonding forms between water molecules?
covalent
hydrogen
ionic
metallic
Cohesion describes the attraction between a water molecule and another type of polar molecule.
True
false
Which of the following molecules is an organic compound?
CH4
H2O
NaCI
O2
When dissolved in water, an acidic compound will produce
CH4
H+
Na+
OH-
On the pH scale, bases have larger values than acids.
True
False
In an organic compound, carbon atoms cannot bond to other carbon atoms.
True
False
Which type of molecules are the building blocks of carbohydrates?
disaccharides
lipids
monosaccharides
nucleic acids
what is used to classify monosaccharide molecules?
the order of nucleic acids
whether their saturated or unsaturated
the number of hydrogen atoms
the number of carbon atoms
Lipids are generally soluble in water.
True
false
Which of the following molecules is not a type of lipid?
cholesterol
glucose
testosterone
cortisone
The molecule that is the physical carrier of inheritance is ______.
RNA
DNA
glucose
protein
which of these molecule groups is involved in long-term energy storage?
carbohydrates
lipids
proteins
nucleic acids