Atoms Notes

Introduction to the Atom Notes

Science 8 Honors

I. The atom is split into two sub areas:

A. Nucleus: Located in the center of the atom; Densest part of the atom; contains the protons and neutrons.

B. Electron Cloud: Surrounds the nucleus; contains electrons.​

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Slide 2

The Atom

​I. Located in the atoms nucleus

II. Has a positive charge

III. Weighs ~ 1 amu

IV. Abbreviation: P+/ p+​

Protons

​I. Located in the atoms nucleus

II. Has a neutral charge

III. Weighs ~ 0 amu

IV. Abbreviation: N/ n​

Neutrons

I. Located in the atoms electron cloud

II. Has a negative charge

III. Weighs ~ 1 amu

IV. Abbreviation: E-/ e-​

Electrons

​Parts of the Atom

Multiple Choice

Understanding Check 1:

Select the best definition for the nucleus of an atom.

• The most dense part of the atom which contains the electrons.

• The location where the protons and neutrons are located.

• The location where the electrons are located.

• The most dense part of the atom which contains the protons and the neutrons.

Multiple Choice

Understanding Check 2.

Select the best definition for the electron cloud of an atom.

• Place that surrounds the nucleus and contains protons and neutrons.

• Place that surrounds the nucleus and contains electrons.

• Densest part of the atom what contains the electrons.

• Densest part of the atom what contains the protons and neutrons

Multiple Select

Understanding Check 3.

Select all the apply: Mark all key characteristics of of a proton.

• P+

• Weighs ~ 1 amu

• P-

• Has a positive charge

• Located in the electron cloud

Multiple Select

Understanding Check 4.

Select all the apply: Mark all key characteristics of of a neutron.

• Located in the nucleus

• N

• Weighs ~ 1 amu

• Has a neutral charge

• Located in the electron cloud

Multiple Select

Understanding Check 5.

Select all the apply: Mark all key characteristics of of a electron.

• Has a negative charge

• E-

• Weighs ~ 0 amu

• Located in the electron cloud

• Located in the nuclus

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