Ninth Grade Chemistry - First Semester

Which characteristic primarily determines whether a compound is classified as an acid or a base?

What is the defining characteristic of a strong acid?

Which statement accurately describes how the size of atoms changes as you move from left to right across a period in the periodic table?

How does the chemical activity of metals typically change as you move down Group 1 (the alkali metals) in the periodic table?

Which of the following statements correctly relates the number of electron shells to the period number in the periodic table?

What is the primary purpose of using the 'alpha particles' in Rutherford's gold foil experiment?

How did the results of electrolysis experiments contribute to the understanding of atomic structure?

What is the role of a catalyst, such as vanadium(V) oxide in the Contact Process for sulfuric acid production?

What experimental evidence led to the conclusion that electrons are fundamental particles present in all atoms, regardless of the element?

Why are noble gases generally unreactive?

Ammonia is produced commercially using the Haber process. Which of the following statements accurately describes a key aspect of this process?

When dilute hydrochloric acid (HCl) reacts with magnesium metal (Mg), what products are formed?

During a neutralization reaction between a strong acid and a strong base, what products are formed?

Which statement accurately describes the relationship between the strength of an acid or base and the pH of its solution?

The use of iodine solution to disinfect surgical tools is an example of what general property of iodine?

What is the role of seawater in the formation of a salt?

What role do testing tubes play in certain chemistry experiments?

How does Carbon 14, as a radioisotope, plays a particularly important role in archaeology?

Acids produce hydrogen (H+) in water and the strength of those acids are:

In some specific combination of elements in the laboratory, it is often necessary to handle samples only after adding what specific element?

The number of protons equal the elements atomic number and an elements isotopes each have:

How do the molecular levels of volume respond to increased counts of protons?

Across a period, the atomic number varies, this means:

Why do metals have a shiny appearance?

How can one test basic levels of traits?

What is the most efficient method for producing saline?

What process has the effect of a "chain reaction"

Why it is critical the components, and ratios of a material effect its properties?

What has led to new knowledge of matter?

Besides collisions, what is another process for scientific achievement?

What affect does large counts of energy have in a physical chain?

How could a student assess this text to its logical strengths?

Other than safety aspects, what is not primarily a benefit for acids to be handled only after being mixed with "aqueous solvent"?

What should a future class contain, that will allow learning new scientific concepts for multiple students to work together?

How does the concentration of hydronium affect acids?

What is the major problem/downside with the usage of "Ammonia"?

In chemistry terms, what do some salts affect with the right quantity and nature?

Compared to the other choices, what do all "noble gases" have?

How could the effect of having an explosion to study an item, be defined?

What is the effect of increasing mass inside a test tube system, while also keeping the charge level the same?