w4 20-30

Question 1

iconic bond

Answer 1

formed when one or more electrons are transferred from one atom to another

Question 2

covalent bond

Answer 2

forms when electrons are shared between atoms.

Question 3

valence electrons

Answer 3

​the electrons in the outer shell or energy level that are available
for bonding.

Question 4

pH

Answer 4

​the measure of acidity or alkalinity of a solution.

Question 5

acid

Answer 5

​a substance that dissolves in water to release a hydrogen ion. (H+)

Question 6

base

Answer 6

​a substance that dissolves in water to release a hydroxide ion. (OH­)

Question 7

Deoxyribonucleic Acid​ (DNA)

Answer 7

the nucleic acid that contains all genetic

information for a cell.

Question 8

Double Helix

Answer 8

​The shape of DNA that resembles a spiral staircase or a twisted
ladder.

Question 9

Nucleic Acid

Answer 9

​The ​building block of living organisms that passes genetic

information from one generation to the next. (e.g. DNA)

Question 10

Nucleotide​

Answer 10

– a monomer of nucleic acid; consisting of a sugar, phosphate, and a nitrogen base. (e.g. A,T,G,C)