benchmark 2 practice

Front

What is a diatomic element?

Back

A diatomic element is a molecule composed of two atoms of the same element, such as O₂ (oxygen) or H₂ (hydrogen).

Front

What is a compound molecule?

Back

A compound molecule is formed when two or more different elements bond together, such as H₂O (water) or CO₂ (carbon dioxide).

Front

What does the periodic table represent?

Back

The periodic table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is atomic size?

Back

Atomic size refers to the distance from the nucleus of an atom to the outermost shell of electrons, which varies among different elements.

Front

How does atomic size change in the periodic table?

Back

Atomic size generally increases down a group due to the addition of electron shells and decreases across a period from left to right due to increased nuclear charge.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

What is the significance of the group number in the periodic table?

Back

The group number indicates the number of valence electrons in the elements of that group, which influences their chemical properties.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with a different chemical composition, often involving a reaction.

Front

What are metals?

Back

Metals are elements that are typically shiny, good conductors of heat and electricity, and malleable, found on the left side of the periodic table.