7th Grade Chemistry

Front

What is a nonmetal?

Back

A nonmetal is an element that is typically dull, poor conductor of heat and electricity, and can be found in various states (solid, liquid, gas) at room temperature.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a non-uniform mixture where the different components can be seen and easily separated.

Front

What are periods on the periodic table?

Back

Periods are the horizontal rows on the periodic table that indicate the number of electron shells in the elements.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a uniform mixture where the components are evenly distributed and cannot be easily distinguished.

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed from two or more elements that are chemically bonded.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).