Chapter 12: Atoms & The Periodic Table

Question 1

Atomic Spectrum

Answer 1

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

An atom’s fingerprint

Question 2

Period

Answer 2

A horizontal row in the periodic table

Question 3

Atomic Symbol

Answer 3

Abbreviation for an element or atom

Question 4

Nucleon

Answer 4

Another name for a proton or neutron;

Any subatomic particle found in the atomic nucleus

Question 5

Shell

Answer 5

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

Question 6

Conceptual Model

Answer 6

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

Question 7

Quantum

Answer 7

Small, discrete packet of light energy

Question 8

Proton

Answer 8

A positively charged subatomic particle of the atomic nucleus

Question 9

Principal Quantum Number n

Answer 9

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

Question 10

Neutron

Answer 10

An electrically neutral subatomic particle of the atomic nucleus

Question 11

Quantum Hypothesis

Answer 11

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

Question 12

Non-metals

Answer 12

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

Question 13

Metalloids

Answer 13

Have characteristics of metals and no-metals

Question 14

Physical Model

Answer 14

A representation of an object on some convenient scale

Question 15

Metals

Answer 15

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

Question 16

Group

Answer 16

A vertical column in the periodic table

Question 17

Element

Answer 17

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

Question 18

Atomic Mass

Answer 18

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

Question 19

Spectroscope

Answer 19

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

Question 20

Atomic Number

Answer 20

Number of protons an atom has

Question 21

Electron

Answer 21

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

Question 22

Atomic Nucleus

Answer 22

Dense, positively charged center of an atom

Question 23

Isotopes

Answer 23

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

Question 24

Periodic Table

Answer 24

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