Chapter 12: Atoms & The Periodic Table Flashcards Preview

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Flashcards in Chapter 12: Atoms & The Periodic Table Deck (24)
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1

Atomic Spectrum

Pattern of frequencies of electromagnetic radiation emitted by the atoms of an element.

An atom's fingerprint

2

Period

A horizontal row in the periodic table

3

Atomic Symbol

Abbreviation for an element or atom

4

Nucleon

Another name for a proton or neutron;

Any subatomic particle found in the atomic nucleus

5

Shell

A region of space around the atomic nucleus within which electrons may reside

6

Conceptual Model

A representation of a system that helps us predict how the system behaves

7

Quantum

Small, discrete packet of light energy

8

Proton

A positively charged subatomic particle of the atomic nucleus

9

Principal Quantum Number n

An integer that specifies the quantized energy level of an atomic orbital

10

Neutron

An electrically neutral subatomic particle of the atomic nucleus

11

Quantum Hypothesis

The idea that light energy is contained in discrete packets called quanta

12

Non-metals

Poor conductors of electricity & heat, may be transparent, NOT malleable, NOT ductile, brittle/shatter when hammered, at room temp some are solid, some are liquid and some are gas

13

Metalloids

Have characteristics of metals and no-metals

14

Physical Model

A representation of an object on some convenient scale

15

Metals

Shiny, opaque, good conductors of electricity & heat, malleable (can be hammered into shapes with breaking), ductile (can be drawn into wires), usually solid at room temp

16

Group

A vertical column in the periodic table

17

Element

Any material that is made up of only one type of atom

18

Atomic Mass

Mass/weight of a particular atom on the periodic table, based on the average of its isotopes' relative abundances

19

Spectroscope

A device that uses a prism or diffraction grating to separate light into its color components

20

Atomic Number

Number of protons an atom has

21

Electron

An extremely small, negatively charged subatomic particle found outside the atomic nucleus

22

Atomic Nucleus

Dense, positively charged center of an atom

23

Isotopes

Members of a set of the same atoms that have different numbers of neutrons

24

Periodic Table

A chart in which all the known elements are listed in order of atomic number