Matter & Changes
This type of change occurs when sugar dissolves in water.
What is a physical change?
This particle determines the atomic number of an element
What is a proton?
The maximum number of electrons in a p sublevel is this many.
What is 6?
Ionic compounds generally form between these two types of elements.
What are a metal and a nonmetal?
This piece of equipment accurately measures liquid volume.
What is a graduated cylinder?
Air is classified as this type of matter.
What is a mixture?
Atoms of the same element with different numbers of neutrons are called these.
What are isotopes?
When an electron falls from an excited state to a lower energy level, it emits this.
What is a photon (light)?
What charge does sulfur typically form as an ion?
What is 2−?
This separation method separates substances based on movement through special paper.
What is chromatography?
Name two indicators of a chemical change.
gas production, precipitate formation, energy change, light production.
Which family contains the most reactive nonmetals?
What are the halogens?
How many orbitals are found in a d sublevel?
What is 5?
Why are Roman numerals used in some ionic compound names?
What is "To indicate a metal with more than one possible charge"?
What method would you use to separate coffee grounds from water?
What is filtration?
Water (1.00 g/mL), corn oil (0.90 g/mL), rubbing alcohol (0.80 g/mL), and ethylene glycol (1.11 g/mL) are placed in a beaker. Which substance settles on the bottom?
What is ethylene glycol?
An atom contains 16 neutrons and has a mass number of 31. Identify the element.
What is phosphorus (P)?
How many unpaired electrons does oxygen have?
What is 2?
Name the compound CuSO₄.
What is copper(II) sulfate?
What method would you use to separate water from salt water?
What is distillation (or evaporation if collecting the salt)?
A substance cannot be separated by physical means and has a uniform composition throughout. What is it classified as?
What is a pure substance?
An ion contains 34 electrons and has a 2− charge. What element is it?
What is selenium (Se)?
Write the shorthand electron configuration for chlorine.
What is [Ne] 3s2 3p5?
Write the formula for ammonium phosphate.
What is (NH₄)₃PO₄?
A mixture contains water and acetone. Which separation method works best and why?
What is distillation because they have different boiling points?