Chemistry Review

​Periodic Table

Periods & Groups​

Multiple Choice

In the outline of the Periodic Table shown, some elements are shown as numbers. Which two metals in the same period?

• 1 and 2

• 1 and 7

• 3 and 5

• 5 and 6

Multiple Choice

Calcium, on the left of Period 4 of the Periodic Table, is more metallic than bromine on the right of this period. Why is this?

• Calcium has fewer electrons.

• Calcium has fewer protons.

• Calcium has fewer full shells of electrons.

• Calcium has fewer outer shell electrons.

Multiple Choice

Which property of elements increases across a period of the Periodic Table?

• metallic character

• number of electron shells

• number of outer shell electrons

• tendency to form positive ions

Multiple Choice

W, X, Y and Z are elements in the same period in the Periodic Table. W and Y are metals. X and Z are nonmetals. Which shows the correct order of these elements across the period?

Multiple Choice

Element X is a nonmetal. In which position of the periodic table could element X be found?

• at the bottom of Group I

• at the top of Group 0

• at the top of Group I

• in the transition elements

Multiple Choice

Which of the following is correct as you move from left to right across a period in the periodic table?

• The atoms get smaller due to an increase in metallic properties.

• The atoms get smaller due to an increase in the electronegativity.

• The atoms get smaller due to an increase in the force of attraction of the electrons with the nucleus.

• The atoms get smaller due to an increase in the atomic mass.

​Periodic Trends

It is how well an element can attract electrons.

​

Noble gases are not electronegative.​

​

It is affected by the:​

• number of protons in the nucleus

• the distance from the nucleus

​

What is electronegativity?

Fill in the Blanks

What does electronegative mean?

Multiple Choice

Which of the following elements is most electronegative?

• Hydrogen (H)

• Fluorine (F)

• Helium (He)

• Francium (Fr)

Multiple Choice

Which is more electronegative?

• Oxygen (O)

• Chlorine (Cl)

Fill in the Blanks

Arrange the following elements in terms of increasing electronegativity:

Ca, Cs, S, Sc, Si, Sr

Fill in the Blanks

Arrange the following in decreasing electronegativity:

N, S, F

Multiple Choice

What element in the third period has the highest electronegativity?

• Ar

• Cl

• Na

• Mg

Multiple Choice

What element in the third period has the lowest electronegativity?

• Ar

• Cl

• Na

• Mg

Multiple Choice

What element is the noble gas in that period?

• Ar

• Cl

• Na

• Mg

Multiple Select

What two elements are gas at room temperature?

• Ar

• Cl

• Na

• Mg

It is the energy required to lose/ remove an electron.

What is ionization energy?

Fill in the Blanks

Arrange in decreasing in the ionisation energy: Ge,Te,Se

Fill in the Blanks

Arrange in increasing in the ionisation energy: C, Cl, S

It is the shortest distance between the atom’s nucleus and the outermost shell of the atom.

What is atomic

radius?

Multiple Choice

Which of the two has larger atomic radius?

• N

• F

Multiple Choice

Which of the two has larger atomic radius?

• N

• Al

Fill in the Blanks

Arrange in decreasing in the atomic radius: P, Po, S

Fill in the Blanks

Arrange in increasing in the atomic size: Li, Al, P

• Count the number of electrons.

• The more electrons, the larger is the atomic size.

• Electrons = protons = atomic number

What is ion size?

Multiple Choice

Which ion is larger in size?

• Na

• Na⁺

Multiple Choice

Which ion is larger in size?

• Cl^-

• Cl

Multiple Choice

Which ion is larger in size?

• S

• S^2-

Multiple Choice

Which ion is larger in size?

• Ca

• Ca²⁺

Multiple Choice

Which ion is larger in size?

• Br^-

• Kr

Fill in the Blanks

Arrange in increasing in the atomic size: I^-, Br^-, Ga³⁺, In⁺

• How closely an element's properties match those of a metal

• Metal's properties are:

  malleable, good conductors, shiny, reflect light

What is metallic

characteristic?

Multiple Choice

Which has more metal characteristic?

• P

• Sb

Multiple Choice

Which has more metal characteristic?

• Sn

• Te

Fill in the Blanks

Arrange in decreasing metallic characteristics: K, Al, Mg

Fill in the Blanks

Arrange in decreasing metallic characteristics: Ga, Fr, In

​Chemical Reactions

​What makes the rate of reaction faster?

​

• increased temperature

• increased concentration

• increased surface area

• adding of catalyst​

These conditions...​​

• increased temperature

• increased concentration

• increased surface area

• adding of catalyst​

  ​

  Increas​e the successful collisions among particles

Multiple Choice

The rate of reaction depends on temperature, concentration, particle size and catalysts. Which statement is not correct?

• Catalysts can be used to increase the rate of reaction.

• Higher concentration decreases the rate of reaction.

• Higher temperature increases the rate of reaction.

• Larger particle size decreases the rate of reaction

Multiple Choice

Calcium carbonate reacts with hydrochloric acid to form carbon dioxide. Which changes would slow this reaction down?

1. decreasing concentration of hydrochloric acid

2. decreasing the particle size of calcium carbonate

3. decreasing the temperature

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

• 1, 2, and 3

Multiple Choice

Which change does not increase the speed of reaction between zinc and hydrochloric acid?

• adding a catalyst

• decreasing the particle size of the zinc

• decreasing the temperature

• using more concentrated acid

Multiple Choice

Which diagram results in the slowest rate of reaction?

Multiple Choice

Which diagram results in the fastest rate of reaction?

Fill in the Blanks

What is activation energy?

Fill in the Blanks

Define the rate of reactions.

Fill in the Blanks

List down factors that affect the rate of reactions

Fill in the Blanks

What is activated complex?

Fill in the Blanks

Adding yeast makes the process of fermentation faster. What is the role of the yeast?

Fill in the Blanks

Why adding more catalysts make the rate of chemical reaction faster?