Periodic Table TEST REVIEW!!!

Subatomic Particles in the Nucleus of an Atom

Protons and Neutrons

How do you caculate the number of neutrons?

Mass # - Atomic #

How do you calculate Mass # of an Atom

Protons in Nucleus + Neutrons in Nucleus

What did John Newlands discover

Law of Octaves- When arranged by atomic mass, each element was similar to element eight places further on periodic table

Mendeleev discovery

First periodic table-Arranged elements in order of increasing atomic mass (WRONG)

Moseley Discovered

Current periodic table. Elements arranged in order of Increasing Atomic #, Theres a periodic repetition of their phys. and chem properties. (Think name- Mo=Modern)

How many periods? (horizontal row)

7

Whats group? (Vertical column)

Similar phys. and chem. properties identified by number and letter

Three classes of elements are:

Metal, Metalloid, Nonmetal

What side of stair step are metals on?

Left

What side of the stair step are nonmetals?

Right. Includes hydrogen despite deciding whether its a metalloid currently

Where are Metalloid properties?

Intermediate between metalss and nonmetals. Border the stair step

Is aluminum a metalloid? What is it?

No. Its a metal.

Whats a name for Group 1A

Alkali metals. Violent reaction w/ water

Whats a name for Group 2A

Alkaline Earth Metals. Form bases w/ water. Do not dissolve well. “Earth Metals”

Name for Group 7A

Halogens

What does Halogens mean?

Salt-forming

What group are Noble Gases in?

8A or Group 0. Very stable.

What are elements in the 1A-7A groups called?

The Representitive Elements

What Group columns are Transition metals in?

Group B. Outer s sublevel full, now filling the d sublevel. Transition between metal and nonmetal area

Inner Transition Metals are located where?

Below the main body of the table in 2 horizontal rows. Has outer s sublevel full and is now filling F sublevel

Why are the Inner Transition Metals no longer called “Rare Earth” elements?

Because some are very abundant

Name atleast 3 properties of Metals

Options: High luster, Malleable, Ductile, conductor, located on left side stair step

Name atleast 3 properties of NonMetals

Options: Located on right side of stair step including hydrogen, brittle, poor luster, poor conductors

Anthinide Series, Actinide Series

6, 7!!

Electrons in an atom are in constant motion in what is known as an:

Electron Cloud

What do we use to measure where an electron is?

Light

Heisenberg Uncertainty Principle:

One cannot sinulatenously determine both the position and momentum of an electron

What is 𝜆=ℎ/𝑚𝑣

De Broglie’s Equation, calculates wavelength of a particle. H is plancks constant, m is mass, v is velocity. Plancks constant is 6.62×10^-34

Whats shell (energy level)

Region around nucleus of atom where an electron is likely moving

Know this image:

Whats an Orbital?

Regions around nucleus of atom w/ high probability of finding an electron. KNOW THE IMAGE

How to calculate max # of electrons in an energy level?

2(n)² or 2(energy level)²

Know this image:

How many electrons can each energy level hold?

s=2 p=6 d=10 f=14

J.W Dobereiner did what?

Grouped elements into triads

Broglie proposed what

Wave-particle duality

Group stored under oil:

Alkali Metals (Group 1A)

how many Electrons in 4th energy level

32

How many orbitals in 3rd energy levels?

9

Transition metals have what sublevel filling?

d

Are noble gasses nonmetal? Are they all gasses?

True, True