Which of the following is a disadvantage of using a model to represent a real-world system or structure? A.
A model cannot be built to scale.
B.
A model cannot replicate all real-world conditions.
C.
A model cannot represent the building materials.
D.
A model cannot be used to describe small objects.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

d. cellulose and starch