Question

Which statement correctly describes one of the substances?

a. Ammonia gas is a substance made from atoms of the elements nitrogen and hydrogen, and each atom has a nucleus containing the same number of neutrons.
b. Argon gas is a substance made from atoms of the element argon, and each atom has a nucleus containing the same number of protons.
c. Carbon monoxide gas is a substance made from atoms of the elements carbon and oxygen, and each atom has a nucleus containing the same number of electrons.
d. Ozone gas is a substance made from atoms of the element oxygen, and each atom has a nucleus containing the same number of electrons.

Answer 1

The correct statement is that argon gas is made from argon atoms with a nucleus containing the same number of protons, which defines the identity of the element argon. Therefore correct option is B

Step-by-step explanation:

The statement that correctly describes one of the substances is: Argon gas is a substance made from atoms of the element argon, and each atom has a nucleus containing the same number of protons. This is explained by the fact that argon is a noble gas which consists of individual atoms that do not form molecules.

Each argon atom has a specific number of protons that defines its element type, which is argon in this case. This number of protons is known as the atomic number, and for argon, this number is 18, so all argon atoms have 18 protons in their nucleus.

The identity of an element is determined by its atomic number; therefore, all argon atoms share the same number of protons.