Explanation

• Atoms that gain electrons become negatively charged ions.
• These are known as Anions.

Explanation

• When an atom gains or loses electrons, it becomes an ion.
• If it gains electrons, it becomes a negative ion (anion).
• It it loses electrons, it becomes a positive ion (cation).

Explanation

• The formula 2n^2 helps in determining the maximum number of electrons present in an orbit, where n is the principal quantum number (energy level).
• This formula is based on the Aufbau principle and the Pauli exclusion principle, which describe how electrons occupy energy levels in an atom.

Explanation

The number shown below the symbol of an element on the periodic table is called the Atomic Mass (or Average Atomic Mass).

It represents the average mass of the element's isotopes, usually featuring decimal places. 

Additional information

Atomic Number (usually above symbol): The number of protons.

Mass Number (not typically on the table): Total protons + neutrons. 

Explanation

The number shown above the symbol of an element on the periodic table is called the atomic number.

This number represents the number of protons in the nucleus of an atom of that element, which uniquely identifies the element. 

Explanation

In the modern periodic table, there are 18 groups (vertical columns) and 7 periods (horizontal rows).

Explanation

• In the periodic table, a columns is considered to be a groups (also known as a family or column).
• Groups are the vertical columns of elements in the periodic table.

Explanation

• The atomic number (Z) is the number of protons in the nucleus of an atom.
• In this case, the atomic number (Z) is 16, which means the number of protons is 16.

Explanation

The atomic mass (A) is the sum of protons and neutrons in the nucleus. In this case:

• Protons (Z) = 11
• Neutrons (N) = 12
• Atomic Mass (A) = Z + N = 11 + 12 = 23

Explanation

Two matrices are equal if and only if they have the same order and corresponding elements are equal.