2425 IA1 Practice Test

Front

What are the properties of elements in Group 2 of the periodic table?

Back

Elements in Group 2, also known as alkaline earth metals, are characterized by having two electrons in their outer shell, which makes them reactive, especially with water. They typically form +2 ions.

Front

What determines whether a liquid will float or sink when mixed?

Back

The density of the liquids determines whether one will float on top of the other. The less dense liquid will float on the denser liquid.

Front

What are the signs of a chemical change?

Back

Signs of a chemical change include the production of gas (bubbles or fizz), a change in temperature (feels cooler or warmer), and a change in volume.

Front

What does it mean when a graph shows a line that is staying the same?

Back

A line that stays the same on a graph indicates that the variable being measured is constant over time.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that can be separated by physical processes, such as filtration or evaporation.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together, and it can only be separated by chemical processes.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³). It determines whether an object will float or sink in a fluid.

Front

What is the difference between physical and chemical changes?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties, helping predict their behavior.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water, where the substance remains H2O but changes state.