Seg One 8 Periodic Table, Acids and Bases, Compounds and Mixture

Based on Dalton's atomic theory, is each statement true about atoms of the same element? (Highlight)

• They have identical mass.

• They have different masses.

• They have identical properties.

• They have different properties.

What did Ernest Rutherford conclude about the atom from his gold foil experiment?

• Most alpha particles went right through.

• Most alpha particles were deflected.

• Most alpha particles were absorbed.

• Most alpha particles disappeared.

Which of the group of elements are human-made and do not occur in nature?

• Actinides

• Halogens

• Noble gases

• Nonmetals

Identify what happens to chemical reactivity of metals as we move down a column on the periodic table?

• The chemical reactivity increases.

• The chemical reactivity decreases.

• The chemical reactivity remains the same.

• The chemical reactivity fluctuates.

Determine the number of protons, electrons, and neutrons present in an atom of magnesium (Mg)? Explain how you determined your answer using complete sentences.

Which of the following is a property of salts?

• Conduct electricity as solids.

• Do not conduct electricity as solids.

• Are highly reactive.

• Are non-reactive.

A substance with a pH of 11.4 is a(n)

• Acid

• Base

• Neutral substance

• Alkaline substance

Explain the difference between acids and bases on the basis of touch. Give an example of each. Use complete sentences.

Which is the most reactive metal shown on the portion of

the periodic table to the left?

• Li

• Be

• K

• Ca

Which is the least reactive element shown on the

periodic table to the left?

• Ca

• Na

• Be

• K