BONUS! 500 Points!
How many electrons can the first ring/orbital shell hold?
How many electrons can the second ring/orbital shell hold?
The first ring/orbital shell can hold a maximum of 2 ELECTRONS
The second ring/orbital shell can hold a maximum of 8 ELECTRONS
Each time you go down a period, the elements gain a(n) _________
Electron shell/ring
On a periodic table, what do periods represent
How many rings/shells an atom has.
BONUS! 500 Points!
An atom’s mass number is 210 and its atomic number is 85. How many neutrons does the atom have?
125
5
What is the number of Neutrons located in this element? Round if necessary.

12 neutrons.
BONUS! 500 Points!
Atomic mass is made up by the number of _______ and ________ .
protons and neutrons
The periodic table is organized by increasing _________.
atomic number.
Why would you expect to find Neon in its pure, uncombined form on nature?
It is a noble gas / It has a full valence shell
These elements can't decide whether they are metals or nonmetals.
Metalloids
Electrons have this charge
negative
What would be the 2 main classifications of the periodic table?
Metals and non-metals
Most metals are solid at room temperature. An exception is _________
Mercury
Why do elements in a group have similar chemical properties?
They have the same number of valence electrons.
Who is credited with developing the first periodic table.
Dmitri Mendeleev
What is the element with the smallest atom on the periodic table?
Hydrogen
Protons have this charge
Positive
Which group contains the most reactive metals?
Alkali metals
What are the 3 subatomic parts of an atom
Protons, electrons, and neutrons
Which element has 18 protons?
Argon
Give two common characteristics of a metal.
shiny, good conductor, malleable, ductile
Give one use of metalloids.
Used as semiconductors used in electronics
What does the Atomic Number represent?
The number of Electrons and Protons located in a specific element.
Elements with similar properties are found in the same ___________.
Family
Inside the sun, nuclear fusion creates helium nuclei from __________
hydrogen nuclei
Which group has members like Li, Rb, K, and Fr?
Alkali Metals
Which group has elements like Xe, Ar, He, and Rn
Noble Gases, Col. 18
Which of the subatomic particles make up most of the volume of an atom?
electrons
What is the charge of the nucleus? Why?
Positive