Subatomic Particles | Elements | Molecules | Compounds | Periodic Table

What are the three subatomic particles?

Proton | neutron | electron.

What is the charge of a proton?

Positive charge.

What is the charge of an electron?

Negative charge.

What is the charge of a neutron?

No charge (neutral).

What do subatomic particles make up?

Atoms.

Where is the nucleus located?

In the center of the atom.

Why does the nucleus contain most of the atom’s mass?

Because it contains protons and neutrons and neutrons are the heaviest particle.

Which subatomic particle is the heaviest?

Neutron.

Where are protons found?

In the nucleus.

Where are neutrons found?

In the nucleus.

Where are electrons found?

In orbitals surrounding the nucleus.

What are the oval‑shaped rings around the nucleus called?

Orbitals.

What do atoms make up?

Elements

What classifies an element and puts it on the periodic table?

When it can not be broken down into a simpler substance

When referring to elements made of two atoms it is called?

Diatomic Particles

How do we remember diatomic molecules?

BrINClHOF

What is it called when it consists of 2 or more atoms

• can be consist of the same type of atoms or different types of atoms

Molecule

What consists of 2 or more different types of atoms?

Compounds

From left to right on the periodic table the atomic number?

Decreases

Elements in the same group share?

Similar properties

Elements in the same period share similar?

Valence Electron Shells

What are the three categories elements on the periodic table can be separated into?

• Metals

• Metalloid

• Non-metals

What best describes a metal?

• Shiny Metallic Luster

• Great heat and electrical conductor

• Ductile

• Malleable

• High density

• High melting point

• High boiling point

• Forms positive cations

• Loses elections

• Basic

What best describes a metalloid?

• Have properties of both metals and non-metals

• On the staircase

What best describes a non-metal?

• Dull apperance

• Poor heat and electrical conductor

• Brittle

• Low density

• Low melting point

• Low boiling point

• Forms anions and cations

• Gains Electrons

• Acidic

What are the four groups on the periodic table that we need to know?

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Noble Gasses

What describes alkali metals?

• Highly reactive

• Forms cations with a 1+ charge

What describes alkali earth metals?

• Highly reactive, but not as much as alkali metals

• Forms cations with a 2 plus charge

What describes Halogens?

• Diatomic

• Forms anion with -1 charge

What describes Noble gasses?

• Non-reactive

• Most stable

• Outer shell is full of valence electrons

When writing an elemental symbol, where does the mass number go?

Top

When writing an elemental symbol, where does the atomic number go?

Bottom