Unit 3 Concept 1 & 2 Study Guide Review

Label the two main parts of the atom.

(nucleus and electron cloud)

a

b

Electron cloud

Nucleus

Tags

NGSS.MS-PS1-1

Where is the majority of mass located? Volume?

a

b

Mass

Volume

Tags

NGSS.MS-PS1-5

Identify the subatomic particles found in the atom.

(proton, neutron, electron)

a

b

c

Electron

Neutron

Proton

Forces that hold an atom together.

Groups:

(a) Attractive Force

,

(b) Repulsive Force

• Proton to proton

• Electron cloud

• Nucleus

• Protons

• Electron to electron

• Electrons

Tags

NGSS.HS-PS2-4

The number of protons in an element​ ​ ​ (a)  

The number of protons and neutrons in an element​ (b)  

The number of total electrons​ (c)  

The identity of an element​ (d)  

The most common form of an element​ (e)  

• Atomic #
• Mass #
• average atomic mass

What does it mean for an atom to be electrically neutral?

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What do two isotopes of the same element have in common?

What is different about two isotopes?

When are isotopes considered most stable?

• Isotopes are most stable with an excess of neutrons.
• Isotopes are most stable when they have no neutrons.
• Isotopes are most stable at extremely high temperatures.
• Isotopes are most stable with a balanced ratio of protons to neutrons.

Tags

NGSS.HS-PS1-8

What is the hyphen notation for the most common isotope of lithium?