The Periodic Table and Atoms

Flashcards about the periodic table and atoms

Atoms are made of , and _

Protons, Neutrons, and Electrons

In our most basic atomic model, _ orbit the Nucleus in shells

Electrons orbit the Nucleus in shells

The outer shell is called the

Valence shell

These “shells” orbit the nucleus because the negative charge on the electron is on the Nucleus.

Attracted to the positive charge on the Nucleus

1st shell _ electrons

2 electrons

2nd shell _ electrons

8 electrons

3rd shell _ electrons

18 electrons

_ are found in the nucleus and are positively charged.

protons

_ are located in electron shells which orbit the nucleus and are negatively charged.

Electrons

_ are found in the nucleus and have no charge.

Neutrons

Columns on are called Groups

The Periodic Table

Rows on are called Periods

The Periodic Table

_ are elements which are good conductors of heat and electricity.

Metals

_ are elements which are not conductors of heat and electricity.

Non-Metals

_ are elements which can act as either a metal or non-metal under certain conditions

Metalloids

is the number of protons in the nucleus

Atomic Number

is the number of protons & neutrons in the nucleus

Atomic Mass

are known as the least reactive elements in the Periodic Table

Noble Gases

_ are known as the most reactive non-metals

Halogens

are the most reactive metal elements

Alkali Metals

_ appear shiny with a silvery-white appearance

Alkaline Earth Metals

group is unique as they can vary the amount of valence electrons that they have

Transition Metals

_ consist of rare metals and radioactive elements that occur naturally on Earth.

Rare Earth Elements