Atomic Structure and Nuclear Chemistry Vocabulary

Question 1

Any of the six chemical elements that make up group 1

Answer 1

Alkaline Metal

Question 2

Any of the six chemical elements that compose group 2

Answer 2

Alkaline Earth Metal

Question 3

Consist of a nucleus made of protons and neutrons orbited by electrons

Answer 3

Atom

Question 4

Mass of Atom

Answer 4

Atomic Mass

Question 5

Defined as a mass equal to one twelfth the mass of an atom of carbon

Answer 5

Atomic Mass Unit (AMU)

Question 6

The number of protons in the nucleus of an atom

Answer 6

Atomic Number

Question 7

A stream of electrons emitted from the cathode of a high-vacuum tube.

Answer 7

Cathode Ray

Question 8

First complete attempt to describe all matter in terms of atoms and their properties.

Answer 8

Daltons Atomic Theory

Question 9

Electrons

Answer 9

Negative electricity on the Electron shell

Question 10

A set of chemical elements in the same vertical column of the periodic table

Answer 10

Group

Question 11

Any of the six nonmetallic elements that constitute group 17

Answer 11

Halogen

Question 12

Chemical elements normally shown in the two rows below all the other elements

Answer 12

Inner Transition Metal

Question 13

Atom or molecule that has a net electrical

Answer 13

Ion

Question 14

A given element have the same number of protons but different number of neutrons

Answer 14

Isotope Mass Number

Question 15

An element that readily forms positive ions (cautions) and has metallic bonds

Answer 15

Metal

Question 16

A chemical element which has a properties of Earth and metal and nonmetal

Answer 16

Metalloid

Question 17

Subparticle found in nucleus with no electrical charge

Answer 17

Neutrons

Question 18

Any of the seven chemical elements that make up group 18

Answer 18

Noble Gas

Question 19

Element that mostly the characteristics of a metal

Answer 19

Non Metal Chemicals

Question 20

A collection of particles called protons and neutrons

Answer 20

Nucleus

Question 21

The horizontal rows of the periodic table

Answer 21

Periods

Question 22

State that the physical and chemical properties of the elements recur in a systematic and predictable way when the elements are arranged in order of increasing atomic number

Answer 22

Periodic Laws

Question 23

All of the elements

Answer 23

Periodic Table

Question 24

Positive charge of Atom

Answer 24

Protons

Question 25

The main group is the group of elements

Answer 25

Representative Elements

Question 26

Any of the set of metallic elements occupying a central block

Answer 26

Transition Metal

Question 27

Liquids resistance to flow

Answer 27

Viscosity

Question 28

Compresite particles consisting of two protons and two neutrons tightly bound

Answer 28

Alpha Particles

Question 29

Alpha particles, also called alpha rays on alpha radiation. Generally produced in the process of alpha decay.

Answer 29

Alpha Radiation

Question 30

Is emitted from the nucleus of an atom during radioactive decay

Answer 30

Beta Particles

Question 31

High energy electron, carrying on negative charge, that are sent out by some radioactive nuclei.

Answer 31

Beta Radiation

Question 32

When an atom splits into two parts, it releases energy

Answer 32

Fission

Question 33

Combining lighter atomic nuclei to form a heavier nucleus.

Answer 33

Fusion

Question 34

High energy phatom that are emitted by radioactive decay.

Answer 34

Gamma Radiation

Question 35

A device used for the detection and measurements of all types of radioation

Answer 35

Geiger Counter

Question 36

Time required for a quantity to reduce to half of its initial value

Answer 36

Half -Life

Question 37

A Nuclear reaction in which an atomic nucleus and one or are neutrons collide and merge to form a heavier nucleus

Answer 37

Neutron Absorption

Question 38

A medium that reduces the speed of fast neutrons

Answer 38

Neutron Moderation

Question 39

A positively charged electron

Answer 39

Positron

Question 40

Energy that comes from a source and travels through space at the speed of light

Answer 40

Radiation

Question 41

Process by which an unstable atomic nucleus loses energy by radiation

Answer 41

Radioactive Decay

Question 42

Radioactive substances, or the radiation emitted by these

Answer 42

Radioactivity

Question 43

The action of changing or the of being changed to another form

Answer 43

Transmutation