Chemistry Final 2021 Exam Review

Chemistry Final 2021 Exam Review

by Israel Iyoke

Fill in the Blank

What element is represented by the orbital notation shown?

Multiple Choice

How many significant figures are in 1.230?

• 1

• 2

• 3

• 4

Multiple Choice

Write 12300 in scientific notation?

• 1.23 x $$10^4$$

• 1.2300

• 1.2300 x $$10^3$$

• 1 x $$10^3$$

Multiple Choice

All of the following are physical properties EXCEPT:

• Flammability

• Length

• Melting Point

• Conductivity

Multiple Choice

Which of the following is true about melting point?

• It is a physical property

• It is the temperature at which solids turn into a liquid.

• It is an intensive property

• All of the above.

Multiple Choice

Which of the following properties is an extensive property?

• Boiling Point

• Density

• Color

• Volume

Multiple Choice

Which of the following is an example of a physical change?

• Glass shattering

• Rusting of Iron

• Bubbles forming in a solution

• Heat is released when Al reacts with CuCl₂

Multiple Choice

Which of the following is an example of a chemical change?

• Water boils at 100°C

• Precipitate is formed when two solutions are mixed

• Salt dissolves in water

• All of the above.

Multiple Choice

All of the following are transition metals in Period 4 EXCEPT:

• Gallium

• Chromium

• Vanadium

• Titanium

Fill in the Blank

The noble gas in Period 5 is:

Multiple Choice

All the elements below share the same chemical properties as Sodium (Na) EXCEPT:

• Li

• Mg

• Cs

• Rb

Fill in the Blank

Which form of nuclear radiation is the strongest in terms of shielding needed to block them? (alpha, beta or gamma)

Fill in the Blank

How many protons are in the isotope of Be⁺²?

Fill in the Blank

How many neutrons are in the isotope of Be⁺²?

Fill in the Blank

How many electrons are in the isotope of Be⁺²?

Multiple Choice

The isotope that will balance the following nuclear reaction is:

 ⁹⁹₄₃Tc → _____ + ⁰₋₁e

• ⁹⁹₄₂Mo

• ⁹⁹₄₃Ru

• ⁹⁹₄₄Ru

• ⁹⁹₄₁Mo

Multiple Choice

All of the following are pure substances with the exception of:

• water (H₂O)

• hydrogen (H₂)

• carbon dioxide (CO₂)

• air (N₂, O₂, CO₂ and Ar)

Fill in the Blank

There are three natural isotopes of element W shown in the table. (Round to 4 significant figures or 2 decimal places)

Multiple Choice

Which of the states of matter do NOT have a definite volume?

• solid only

• liquid only

• solid and liquid

• gas only

Fill in the Blank

Metals form _________ions when they ________ electrons.

(use commas and a space to separate the two missing words)

Multiple Choice

Which element below will lose electrons when forming an ion?

• Chlorine (Cl)

• Nitrogen (N)

• Oxygen (O)

• Sodium (Na)

Fill in the Blank

How many valence electrons will nitrogen gain when forming ion?

Fill in the Blank

The electron dot structure for the unknown element X is shown below. What is the possible identity for this element.

Fill in the Blank

Write 2.9 x 10⁴ _{in standard form.}

Fill in the Blank

Ionic compounds are made from ________ and ________

Multiple Choice

What compound below is an example of a covalent compound?

• NaCl

• KI

• CH₄

• FeO

Multiple Choice

What compound below is an example of an ionic compound?

• H₂O

• MgI₂

• NCl₃

• PH₃

Multiple Choice

The name for the IONIC compound AlBr₃ is:

• Aluminum Bromide

• Aluminum (III) Bromide

• Aluminum Bromine

• Bromine Aluminide

Multiple Choice

The name for the COVALENT compound NO₂ is:

• Nitride Dioxide

• Mononitrogen Dioxide

• Nitrogen Oxide

• Nitrogen Dioxide

Multiple Choice

The formula for the COVALENT compound is Phosphorus Trichloride:

• PCl₃

• PCl

• Cl₃P

• P₃Cl

Multiple Choice

The formula for the IONIC compound Potassium Oxide is:

• K₂O

• KO₂

• KO

• K₂O₂

Multiple Choice

The formula for the IONIC compound Calcium Phosphide is:

• Ca₃P₂

• Ca₂P₃

• CaP

• CaPO₄