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Flashcards in Chapter 3B Deck (21)
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1

Who was the Greek philosopher who began the search for a description of matter more that 2400 years ago?

Democritus

2

In 1897, who was an English scientist that provided the first hint that an atom is made of even smaller particles (electrons).

JJ Thomson

3

Who won the Nobel Prizes in Chemistry and Physics for the discovery of Ra and Po, and the phenomenon of radiation ?

Marie Curie

4

Who concluded that atoms had a hard center (nucleus) and are mostly empty space, and discovered 3 different types of radioactive particles.

Ernest Rutherford

5

In the early 1800’s what English chemist performed a number of experiments that eventually led to the acceptance of the idea of atoms?

John Dalton

6

Who did the preliminary work for the discovery of radiation?

Antoine Henri Becquerel

7

What term mean the time it takes for half of an amount of a radioactive substance to decay?

Half-life

8

What is the term for the number of protons in an atom?

Atomic number

9

What is the term for when a radioactive atom splits into two?

Fission

10

What is the term for atoms that have the same number of protons but different number of neutrons?

Isotope

11

What is the term for particles that are located in the nucleus of the atom (protons and neutrons)?

Nucleons

12

What is the term that shows the radioactive decomposition of an element?

Nuclear equation

13

What is the term for the number of protons and neutrons?

Mass number

14

What is the term for the process by which the nuclei of atoms emit particles and rays?

Radioactivity

15

What is the ter for each unique atom?

Nuclide

16

What is the term for two nuclei combine to produce a nucleus of heavier mass accompanied by the release of a large amount of energy?

Fusion

17

What is the term for a self-sustaining sequence of nuclear fission reactions?

Nuclear chain reaction

18

What is the term for the penetrating rays and particles emitted by a radioactive source?

Radiation

19

What is the term for the minimum mass of fissionable material required to generate a self-sustaining nuclear chain reaction?

Critical mass

20

Be able to identify the atomic models and identify their parts

See Mrs. Krumpelman for help

21

Be able to determine the alpha decay and the Beta decay of an element.

See Mrs. Krumpelman for help