Chemistry Benchmark 2 Study Guide

Front

When would you use distillation to separate a mixture?

Back

When you need to separate a liquid from substances dissolved in a liquid.

Front

What is each vertical column of the periodic table called?

Back

Group

Front

In the Bohr model of the atom, how are the energy levels similar to the rungs on a ladder?

Back

Electrons cannot exist between energy levels.

Front

How are elements and compounds different?

Back

Elements are made of one type of atom, while compounds are made of two or more types of atoms.

Front

Why is air classified as matter?

Back

It has mass and occupies space.

Front

What is the definition of a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an ion?

Back

An atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What is the difference between an ionic bond and a covalent bond?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the pH scale?

Back

A scale that measures the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic).