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Flashcards in C16 Terms Deck (45)
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1

law of definite proportions

Established that masses if chemical substances combine in definite repeatable ratios

2

core-envelope model

Based on the caloric theory

3

plum-pudding model

Atoms are masses that have a positively charged (pudding) in which the negatively charged electrons stay

4

nuclear model

Every atom has a nucleus and electrons circle around it

5

planetary model

Electrons circle around the nucleus

6

quantum model

Electrons move in waves around the nucleus

7

orbital

Subregions of space

8

nucleon

Neutrons and protons in the nucleus

9

elementary particle

Subatomic particles that are the building blocks of photons neutrons and electrons

10

atomic number (Z)

The number of protons in the nucleus

11

isotope

Aims of elements that have different numbers of neutrons

12

mass number

Tells isotopes apart

13

isotopic notation

Shows both the atomic and mass numbers of the element

14

atomic mass

The mass of an electron expressed in atomic mass units

15

atomic mass unit (u)

The mass equal to 1/12th the mad of a carbon atom

16

energy level

Represent the regions where an electron with a certain amount of energy is most likely to be found.

17

electron configuration

Is the arrangement of the energy levels and the positions that electrons can take within those energy levels for a given number of electrons.

18

valence electron

The electrons in the outermost energy level

19

nuclear chemistry

The study of changes in atomic nuclei

20

radioactivity

The emission of nuclear radiation

21

nuclear radiation

The rays and particles emitted by unstable nuclei

22

alpha particle

Positively charged particles

23

beta particle

Negatively charged particles

24

gamma decay

A nucleus shedding energy by releasing gamma rays

25

alpha decay

The atoms nucleus loses two protons and two neutrons

26

beta decay

The atom loses a beta particle and emits gamma rays

27

radioactive dating technique

Using nuclear decay to date things

28

nuclear bombardment reaction

When a nucleus is stuck by a high energy particle

29

nuclear fission

The splitting of an atom

30

chain reaction

When one atom after another is broken apart