Chemistry EOC Review

Front

What are bases?

Back

Bases are compounds that feel slippery, taste bitter, and turn red litmus paper blue. They can accept protons or donate electron pairs in chemical reactions.

Front

Who was the first person to theorize the existence of an atom?

Back

Democritus was the first person to theorize the existence of an atom, proposing that matter is made up of small, indivisible particles.

Front

What type of solution is 100 grams of NaBr at 20°C?

Back

It is an unsaturated solution, meaning it can still dissolve more solute at that temperature.

Front

What is the formula for the compound formed by calcium and oxygen?

Back

The formula is CaO.

Front

What do isotopes differ in?

Back

Isotopes differ in the number of neutrons they contain.

Front

What are acids?

Back

Acids are substances that taste sour, can turn blue litmus paper red, and can donate protons in chemical reactions.

Front

What is a saturated solution?

Back

A saturated solution is one in which the maximum amount of solute has been dissolved at a given temperature.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed when two atoms share one or more pairs of electrons.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons from one atom to another, while covalent compounds are formed by the sharing of electrons.