Midterm Review

Chemistry

• Study of all substances and the changes they undergo.

• The study of the elements in the periodic table

• The study of physical and chemical properties of matter

• The study of the structure of atoms and molecules

What is the correct name of H₂C₂O₄

• Oxalic Acid

• Hydrogen Dichloride Carbonate

• Hydrochloric Carbonate

• Hydrogen Dichloride Oxide

Formula of trinitrogen tetroxide?

• N3O2

• CH2O4

• CO2

• H2O4

Correct name of HC₂H₃O₂?

• Acetic Acid

• Hydrogen Carbonate

• Hydrochloric Acid

• Hydrofluoric Acid

Match the element to the family.

• Alkali Metal

• K

• Halogen

• F

• Noble Gas

• U

• Inner transition metal

• Ag

• Transition Metal

• Xe

Put these in order of smallest number of valence electron to most.

• C

• F

• Li

• Al

• Ca

Which of these could be an indicator of a chemical reaction occuring?

• Settling of a precipate

• evaporation of the substance

• total mass of the mixture changing

• decrease in volume

Which of these is a liquid?

• B

• A

• C

How many valence electrons does Calcium have?

• 2

• 8

• 1

• -2

Why does burning strontium appear red?

• As excited electrons lose energy they give off red photons

• Burning strontium appears red because it reflects the color of the sun.

• Burning strontium appears red because it is made of red molecules.

• Burning strontium appears red because the heat causes it to emit a red glow.