11-30

Question 1

Atom

Answer 1

The basic unit of matter

Question 2

Proton

Answer 2

the positively charged particle found in the nucleus of an atom.

Question 3

Neutron​

Answer 3

the particle with no charge found in the nucleus of an atom.

Question 4

Electron

Answer 4

the negatively charged particle found outside the nucleus of an atom.

Question 5

Element

Answer 5

Element ­ A pure substance that consists entirely of one type of atom.

Question 6

Molecule

Answer 6

​A group of atoms bonded together forming the smallest fundamental unit of a pure substance.

Question 7

Isotopes​

Answer 7

atoms of the same element with different numbers of neutrons.

Question 8

Chemical Bonding ­ ​

Answer 8

­ ​an attraction between two or more atoms resulting in the formation of different chemical substances

Question 9

Chemical reaction

Answer 9

Chemical reaction ­ ​changes in chemical substances involving bond breaking and/or bond forming resulting in different chemical substances

Question 10

Ion​

Answer 10

a positively or negatively charged atom.

Question 11

Ionic Bond​

Answer 11

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

Question 12

Covalent Bond​

Answer 12

forms when electrons are shared between atoms.

Question 13

Valence Electrons

Answer 13

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

Question 14

pH ­

Answer 14

the measure of acidity or alkalinity of a solution.

Question 15

Base ­

Answer 15

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

Question 16

Acid ­ ​

Answer 16

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

Question 17

Deoxyribonucleic Acid​ (DNA)

Answer 17

the nucleic acid that contains all genetic information for a cell.

Question 18

Double Helix ­ ​

Answer 18

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

Question 19

Nucleic Acid ­ ​

Answer 19

­ ​The ​building block of living organisms that passes genetic information from one generation to the next. (e.g. DNA)

Question 20

Nucleotide​

Answer 20

a monomer of nucleic acid; consisting of a sugar, phosphate, and a

nitrogen base. (e.g. A,T,G,C)