Performance Task Assessment Review

Identify the valence electron(s).

Tags

NGSS.MS-PS1-1

Identify the core electron(s).

Tags

NGSS.MS-PS1-1

How many core electrons does Lithium have?

Tags

NGSS.MS-PS1-1

How many valence electrons does Lithium have?

Tags

NGSS.MS-PS1-1

What is atomic radius?

• How many electrons an element has.

• How much space an atom takes up

• How heavy an element is.

• A measure of how much radiation an atom has been exposed to.

Which has a larger radius?

• The balloon

• The rock

• They take up the same amount of space

Which has more mass?

• The balloon

• The rock

• They weigh the same/have the same mass

Is something always bigger because it weighs more?

• Yes

• No

• Yes but in orange

As you go down a group, you add energy levels, which ​ (a)   the atomic radius. Therefore, the trend is that elements towards the bottom of the table have a larger radius.

• increases
• decreases
• does not affect

As you go down a group, you add energy levels, which ​ increases the atomic radius. Therefore, the trend is that elements towards the ​ (a)   of the table have a larger radius.

• bottom
• top
• middle