Chemistry Lecture Notes: Atoms and Ions

A compilation of flashcards covering key concepts related to atoms, ions, oxidation, and reduction based on lecture notes.

What occurs when an atom gains electrons?

It becomes a negative ion.

What is transferred during oxidation and reduction processes?

Electrons.

What happens to the copper ion in chalcocite when it gains electrons?

It is reduced.

What is the process of obtaining a metal from its ore called?

Reduction.

What happens to a metal atom's electrons during oxidation?

Electrons are lost by the atom.

In an electroplating cell, which part should the object to be plated be?

The cathode that is negative.

Which equation correctly represents the oxidation of calcium to calcium ion?

Ca → Ca²⁺ + 2e⁻.

Which element is known to resist oxidation and is found uncombined in nature?

Platinum.

What is the truth about the mineral resources of our planet?

They are nonrenewable and not evenly distributed.

What is the charge and location of a neutron in an atom?

0 charge and located in the nucleus.

What are the positively charged particles in the nucleus of an atom called?

Protons.

Which two subatomic particles are found in the atom's nucleus?

Protons and neutrons.

What is the charge on the anion in substance C in a reaction involving CuS?

2-.

If an atom loses an electron, what does it become?

A positive ion.

What do atoms that become ions do with their electrons?

They have lost or gained electrons.

Which symbol does not represent an ion?

Na.

What do particles with the same charge do when moved closer together?

They repel.

How does an atom become an ion?

The atom gains or loses electrons.

What is the name given to a positive ion?

Cation.