Period and Group Review

What is a key characteristic of neon that makes it different from oxygen?

• Neon is highly reactive, while oxygen is not.

• Neon is a noble gas and is extremely unreactive, while oxygen is highly reactive.

• Neon forms compounds easily, while oxygen does not.

• Neon has an incomplete outer electron shell, while oxygen has a complete one.

Why are noble gases like neon found in their pure form in nature?

• Because they have an incomplete outer electron shell.

• Because they are highly reactive and form many compounds.

• Because they have a full set of electrons and do not easily engage in chemical bonding.

• Because they are essential for life processes like respiration.

What drives oxygen to form bonds with other elements?

• Its complete outer electron shell.

• Its need for two more electrons to achieve stability.

• Its status as a noble gas.

• Its lack of reactivity.

On the periodic table, Oxygen has ​ (a)   energy shells and is in Period​ (b)   . It has ​ (c)   valence electrons and is in Group​ (d)   .

• 2
• 6
• 4
• 5
• 8

Tags

NGSS.MS-PS1-1

Neon is​ (a)   because it has a ​ (b)   outer energy shell with ​ (c)   valence electrons. in the presence of other atoms, it will not accept or give away its' valence electrons.

• stable
• full
• 8
• 2
• unstable
• 6

Tags

NGSS.MS-PS1-1

Determine if each atom is stable or unstable based on their valence electrons.

Groups:

(a) Stable

,

(b) Unstable

• 
• 
• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Oxygen atom is ​ (a)   because it has only​ (b)   valence electron and will react with other elements to gain​ (c)   more valence electrons to become stable.

• unstable
• 6
• 2
• 3
• stable

Tags

NGSS.MS-PS1-1

What is the periodic table organized into?

• Horizontal rows called periods and vertical columns known as groups

• Vertical rows called periods and horizontal columns known as groups

• Horizontal rows called groups and vertical columns known as periods

• Vertical rows called groups and horizontal columns known as periods

What happens to the atomic number as you move across a period from left to right?

• It increases

• It decreases

• It remains the same

• It fluctuates

Elements in the same Period(row) have the ​ (a)   . Potassium (K) has (b)   energy levels

• small Atomic mass
• Same atomic mass
• 4
• same number of enery shells.
• 2