Science Chemistry - Topics 1-4

Atoms

1

Sub-atomic particle that has no charge

Neutron (n)

2

Subatomic particle that is NOT found in the nucleus

Electron (e^-)

3

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 Ar^-42 (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 particle embedded within a cloud of positive charge

Thomson's Model

3

It represents the Atom as a "solar system"

a. Cloud Model

b. Thomson's Model

c. Bohr's Model

d. Dalton's Model

c. Bohr's Model

4

Is a model that represents the electrons in motion, behaving both as a wave and as a particle

Cloud Model

5

From among the choices, find the correct relation of the energy levels and the electrons that it can hold

Orbit     e^-

3     |     32

1     |    2

4     |     8

2     |    18

Orbit     e^-

1    |      2

The Periodic table

1

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

Periods and Groups

2

Is the total amount of "A" groups of the periodic table

8

3

An element with 4 valence electrons and a total of 14 electrons

Si (Silicon)

4

An element of the Period 5 with 7 valence electrons

I (Iodine)

5

Name an element that has 1 electron left to complete the last orbit and has a mass of about 79.9 UMA's

Br (Bromine)

Bonding

1

A Dot Diagram is considered "full" with:

8 electrons

2

Is a type of bond between a Metal and a Non-Metal

a. Ionic

b. Covalent

c. Metallic

a. Ionic

3

Elements that share properties in common like: Solid state, luster and conductivity of heat

Metals

4

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

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

Ar, H, N, Cl

5

The correct Dot Diagram for Nitrogen has:

a. 5 Valence Electrons: 3 single and 1 pair

b. 5 Valence Electrons: 1 single and 2 pairs

c. 7 Valence Electrons: 3 pairs and 1 single

a. 5 Valence Electrons: 3 single and 1 pair

Types of Bonds

1

Given the formula CaO_2. What kind of Bond will it form? 

Ionic

2

Given the formula NO_2. What kind of bond will it form?

Covalent

3

Is an atom with a positive or a negative charge

an Ion

4

For the formula NaF, describe and respond which is the Cation and which is the Anion. Mention the charge for each.

Na⁺¹ F^-1

5

(1 minute question) Draw a Dot Diagram for NOH compound. Is this molecule Polar or Non-Polar?

Polar