CMM. Science Chemistry. October Quiz. 2025-2026

Atoms

1

Sub-atomic particle that has no charge

Neutron (n)

2

Subatomic particle that is NOT found in the nucleus

Electron (e^-)

3

In Neutral Atoms, the atomic number is directly related with the amount of:

a. Neutrons and Protons

b. Protons and Electrons

c. Electrons, Protons and Neutrons

b. Protons and Electrons

4

_____ are elements with the same amount of ________ but diferent amount of _________

a. Isotopes - Electrons - Protons

b. Isotopes - Neutrons - Protons

c. Isotopes - Protons - Neutrons

d. Ions - Electrons - Neutrons

c. Isotopes - Protons - Neutrons

5

Given the Isotope Ar⁴² (atomic number 18). Calculate the amount of neutrons that this Isotope has.

24 Neutrons

Atomic Theory

1

In Dalton's model, this particle was considered "indivisible"

The Atom

2

On this atomic model, the electron was discovered and described as a negatively charged particle found within a solid atom with a positive charge

Thomson's Model

3

It represents the Atom as a "solar system" in which electrons set on different "orbitals"

a. Cloud Model

b. Thomson's Model

c. Bohr's Model

d. Dalton's Model

c. Bohr's Model

4

Is an atom with a positive or a negative charge

an Ion

5

Is a model that represents the electrons in motion with no defined position aroung the Atom

Cloud Model

The Periodic table

1

The periodic table is arranged on rows and columns, which are called:

Periods and Groups

2

From the following list select only those that are Non-Metals

Si, Ar, Ca, Na, H, N, Ga, Cl

Ar, H, N, Cl

3

These elements share properties in common like: Solid state, luster, conductivity of heat and Electricity

Metals

4

Pick the Element with the least Metallic Character

a) Sodium   b) Potasium c) Magnesium d) Aluminum

d) Aluminum

5

It's a Family of Elements that do not chemically react with another element from the Periodic Table

Noble Gases

Ions and Isotopes Problems

1

K⁺¹ is: 

a) a Cation

b) An Anion

a) a Cation

2

A Chlorine atom that gains one electron will result in:

a) An Anion

b) A Cation

a) An Anion

3

Given the Ion Au+2. How many electrons? Consider the atomic number of Au = 79

77 Electrons

4

A Nitrogen Ion with 9 electrons will give a resultant charge of: _______ . Nitrogen Atomic Number = 7

-2

5

An element has three Isotopes with the following particles on its nucleus: 

Isotope A: 32 p⁺ and 41 N⁰

Isotope B: 32 p⁺ and 40 N⁰

Isotope C: 32 p⁺ and 38 N⁰

Which Element is this and how much is the mass of each Isotope?

Ge 73

Ge 72

Ge 70