8th grade interim Assessment

Front

What is the most soluble salt at 25 °C according to solubility charts?

Back

Sodium nitrate is the most soluble salt at 25 °C.

Front

How can you determine which solution has the highest salt concentration?

Back

The solution with the highest amount of dissolved salt relative to the volume of water has the highest salt concentration.

Front

What type of molecule releases OH- ions?

Back

A base is a type of molecule that can release OH- ions.

Front

What happens to the volume of a gas when the temperature decreases?

Back

The volume of a gas decreases as the temperature decreases.

Front

What are the characteristics of protons?

Back

Protons contribute to the mass of an atom, are located in the nucleus, and determine the atomic number of an element.

Front

What are the characteristics of neutrons?

Back

Neutrons contribute to the mass of an atom, are located in the nucleus, and have no charge.

Front

What is the mass of protons and neutrons in atomic mass units (amu)?

Back

Both protons and neutrons have a mass of approximately 1 amu.

Front

How do protons and neutrons compare in terms of charge?

Back

Protons have a positive charge, while neutrons have no charge.

Front

What is the significance of the atomic number?

Back

The atomic number is the number of protons in an atom and determines the identity of the element.

Front

What is the effect of placing a sealed water bottle in a boiling water bath followed by a cold water bath?

Back

The water bottle collapses due to the decrease in volume as the temperature decreases.