Question

1. the process by which crystals form from a solution is called _________.
2. the pattern in which atoms bond in a crystal is known as a _________ structure.
3. the bond in which atoms share electrons equally is a _________ covalent bond.
4. the bond in which atoms share electrons unequally is a _________ covalent bond.
5. the attraction between oppositely charged ions is called an _________ bond.
6. a solid that forms from liquid as it cools or evaporates is called a _________.

part 4: matching (1 point each)
match each term (column a) with its correct description (column b).
column a

1. ionic bond
2. covalent bond
3. molecule
4. crystal lattice
5. element
6. compound
7. ion
8. metallic bond
9. chemical formula
10. polar molecule

column b
a. electrons are shared between atoms
b. atoms transfer electrons
c. the smallest unit of a compound
d. repeating 3d pattern of particles
e. made of one type of atom only
f. made of two or more elements chemically bonded
g. an atom that has gained or lost electrons
h. atoms share electrons in a \sea\ of electrons
i. a symbol showing the elements and ratio in a compound
j. has a positive and negative end due to uneven sharing

Explanation:

• Ionic bond: In ionic bonding, atoms transfer electrons to form ions, and the electrostatic attraction between oppositely - charged ions holds them together. So, ionic bond (Column A 41) matches with B (Column B).
• Covalent bond: Covalent bonds involve the sharing of electrons between atoms. So, covalent bond (Column A 42) matches with A (Column B).
• Molecule: A molecule is the smallest unit of a compound that retains the chemical properties of the compound. So, molecule (Column A 43) matches with C (Column B).
• Crystal lattice: A crystal lattice is a repeating 3 - D pattern of particles (atoms, ions, or molecules). So, crystal lattice (Column A 44) matches with D (Column B).
• Element: An element is made up of only one type of atom. So, element (Column A 45) matches with E (Column B).
• Compound: A compound is made of two or more elements that are chemically bonded. So, compound (Column A 46) matches with F (Column B).
• Ion: An ion is an atom that has gained or lost electrons, resulting in a net charge. So, ion (Column A 47) matches with G (Column B).
• Metallic bond: In metallic bonding, atoms share electrons in a "sea" of electrons. So, metallic bond (Column A 48) matches with H (Column B).
• Chemical formula: A chemical formula is a symbol that shows the elements and their ratio in a compound. So, chemical formula (Column A 49) matches with I (Column B).
• Polar molecule: A polar molecule has a positive and negative end due to uneven sharing of electrons. So, polar molecule (Column A 50) matches with J (Column B).

Answer:

1. B. Atoms transfer electrons
2. A. Electrons are shared between atoms
3. C. The smallest unit of a compound
4. D. Repeating 3D pattern of particles
5. E. Made of one type of atom only
6. F. Made of two or more elements chemically bonded
7. G. An atom that has gained or lost electrons
8. H. Atoms share electrons in a "sea" of electrons
9. I. A symbol showing the elements and ratio in a compound
10. J. Has a positive and negative end due to uneven sharing