benchmark 2 practice

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What are the signs of a chemical reaction?

Back

Signs of a chemical reaction include color change, temperature change, gas production, and the formation of a precipitate.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements, organized by increasing atomic number, that shows the relationships between them.

Front

What are metals?

Back

Metals are elements that are typically shiny, malleable, ductile, and good conductors of heat and electricity.

Front

What are nonmetals?

Back

Nonmetals are elements that are generally poor conductors of heat and electricity and can be gases, liquids, or brittle solids.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element, consisting of protons, neutrons, and electrons.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another, such as melting or boiling.