Unit 1 Review

Which of these statements is true about two blocks of gold that are different shapes but have the same mass? 

• They have the same volume, but different densities. 

• They have different volumes, but the same density. 

• They have different volumes and different densities.

• They have the same volume and the  same density.

What does the symbol (s) stand for?

• solid

• aqueous

• solution

• gas

Most of the elements in the periodic table are

• solid metals

• gaseous nonmetals

• liquid metals

• radioactive

What group is the least reactive group of elements on the periodic table?

• alkali metals

• halogens

• noble gases

• transition metals

Isotopes of uranium have different

• numbers of protons

• numbers of electrons

• atomic masses

• atomic numbers

A flame test with lithium chloride, LiCl, produces a red color, A flame test with sodium sulfate, Na₂SO₄, produces a yellow-orange color. What color would you expect in a flame test with lithium sulfate, LiSO_4.

• red

• yellow-orange

• orange

• pink

Calcium is an alkaline earth metal. How many valence electrons does calcium have?

• 1

• 2

• 7

• 8

Which of these are the correct labels for the two shell diagrams below?

• a fluorine atom and a fluoride ion with a charge of -1

• a fluorine atom and a fluoride ion with a charge of +1

• a fluorine atom and a neon atom

• a neon atom with a charge of +1 and a neon atom

The chemical formula for copper (II) phosphate is Cu₃(PO₄)₂. What is the charge on each phosphate ion?

• -1

• -2

• +2

• +1

Which element has this electron configuration: [He]2s²2p¹?

• Lithium

• Boron

• Sodium

• Aluminum