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Notes on Subatomic Particles. proton. neutron. There are 3 subatomic particles in an atom: 1. 2. 3. electron. nucleus. Electrons. (negative). Proton Neutron. (positive). (neutral). 1 amu (atomic mass unit). positive. nucleus. (p + ). neutral. nucleus. 1 amu. (n).

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Notes on subatomic particles

Notes on Subatomic Particles

proton

neutron

There are 3 subatomic particles in an atom:

1.

2.

3.

electron


nucleus

Electrons

(negative)

Proton

Neutron

(positive)

(neutral)


1 amu

(atomic mass unit)

positive

nucleus

(p+)

neutral

nucleus

1 amu

(n)

Zip around

nucleus in

shells

(e-)

negative

_1_ amu

1837


When using the periodic table to find subatomic particle information
When using the periodic table to find subatomic particle information…

Atomic mass #

symbol

A

Z

Atomic #

Atomic mass # :

  • Is a number in decimal form

  • When you round it, it tells you the mass of p+ + n + e-

x

Atomic # :

  • Tells the # of p+

  • Tells the # of e-

To find the # of neutrons:

Atomic mass # - atomic # = # neutrons


Atoms that aren t typical
Atoms that aren’t typical information…

  • ISOTOPE – atom with a number of neutrons that is higher or lower than what’s indicated on the periodic table (typically radioactive)

  • ION – atom with a number of electrons that is higher (anion) or lower (cation) than what’s indicated on the periodic table


Examples on subatomic particle worksheet
Examples on Subatomic Particle Worksheet: information…

23

sodium

11

11

12

11

11

91

Zr

zirconium

40

40

40

40

Cs

cesium

55

55

78

133

55


Notes on the periodic table
Notes on the Periodic Table information…

  • Periodic table created by Dimitri Mendeleev

He organized it by increasing mass

(doesn’t work…look at #27 and #28)

and by similar properties

  • NOW organized by increasing atomic number and by similar properties


Organization of the periodic table
Organization of the Periodic Table information…

Rows () – periods, shells, energy levels,

electron clouds

Columns (↕) – groups, families, # of valence

electrons

Left of Zig Zag Line - metals, cations (positive ions)

Zig Zag Line – metalloids, semi-metals, semiconductors

Right of ZigZag Line – non-metals, anions (negative ions)


Families of the periodic table
Families of the Periodic Table information…

  • Column 1 – Alkali Metals

  • Column 2 – Alkaline Earth Metals

  • Column 8 (18) – Nobel Gases

  • Column 7 (17) – Halogens

  • Column 6 (16) – Oxygen Family

* Column 5 (15) – Nitrogen Family

**Note: Only Down to Zig Zag line for Oxygen Family and Nitrogen Family!!


Families of the periodic table continued
Families of the Periodic Table continued… information…

Middle of the periodic table …

TRANSITION METALS

  • Coinage Family (Cu, Ag, Au)

  • Lanthanides (1st row on bottom)

  • Actinides (2nd row on bottom)


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