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

• Electrons

• Electron to electron

• Electron cloud

• Nucleus

• Proton to proton

• Protons

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?

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?