Biochemistry Practice Quiz

A certain mass of carbon reacts with 13.6 grams of oxygen to form carbon monoxide. _____ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions?

• 25.6

• 6.6

• 13.6

• 136

• 27.2

Answer explanation

Carbon monoxide has a 1:1 ratio of carbon to oxygen, and carbon dioxide is a 1:2 ratio, needing double the oxygen.

Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electrical field?

• Both beta and gamma are deflected in the same direction, while alpha shows no response

• Both alpha and gamma are deflected in the same direction, while beta shows no response

• Both alpha and beta are deflected in the same direction, while gamma shows no response

• Alpha and beta are deflected in the same direction, while gamma shows no response

• Only alpha is deflected, while beta and gamma shows no response

_____ and _____ reside in the atomic nucleus

• Protons and electrons

• Electrons and nuetrons

• Protons and nuetrons

• None of the above

• Only nuetrons

200 pm is the same as _____ A

• 2000

• 20

• 200

• 2

• 2 x 10^-12

The atomic number indicates _____

• The number of nuetrons in a nucleus

• The total number of nuetrons and protons in a nucleus

• The number of protons or electrons in a neutral atom

• The number of atoms in 1 g of an element

• The number of different isotopes of an element

The nucleus of an atom contains _____.

• Electrons

• Protons, nuetrons, and electrons

• Protons and nuetrons

• Protons and electrons

• Protons

In the periodic table, the rows are called _____ and the columns are called _____.

• Octaves, groups

• Staffs, families

• Periods, groups

• Congeners, families

• Rows, groups

Which group in the periodic table contains only nonmetals?

• 1A

• 6A

• 2B

• 2A

• 8A

The element _____ is the most similar to strontium in chemical and physical properties.

• Li

• At

• Rb

• Ba

• Cs

Elements in Group 1A are known as the _____

• Chalcogens

• Alkaline earth metals

• Alkali metals

• Halogens

• Noble gases