Module 19

Why do all bonds form?

• to fill the outermost energy level

• so an atom can be unstable

• so the number of protons and electrons can equal.

• so they can gain neutrons.

This is the correct dot diagram for sodium (Na)

• true

• false

Tags

NGSS.MS-PS1-1

Classify the following molecule.

• polar

• nonpolar

Tags

NGSS.MS-PS2-3

Classify the following molecule.

• polar

• nonpolar

Tags

NGSS.MS-PS1-1

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

Is the following molecule polar or nonpolar?

• polar

• nonpolar

Tags

NGSS.MS-PS1-1

A chunk of limestone, which is calcium carbonate, reacts with acid at a certain rate. If the limestone were crushed, providing greater surface area, would the reaction happen faster or slower?

What type of reaction is this? 3Na(OH) + FeBr₃ → 3NaBr + Fe(OH)₃

• synthesis

• decomposition

• single replacement

• double replacement

• combustion

A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?

• The level of the substance in the beaker is higher after the other liquid is added.

• Small white crystals are left behind in the flask that held the first liquid.

• A yellow solid forms and then settles to the bottom of the beaker.

Tags

NGSS.MS-PS1-2

Why do all bonds form?

• to fill the outermost energy level

• so an atom can be unstable

• so the number of protons and electrons can equal

• so they can gain neutrons