Free Printable Module 3: Periodic table and energy

Worksheets

Module 3: Periodic table and energy

Total questions: 25

Worksheet time: 21mins

Name

Class

Date

When across a period, the atomic size decreases so the first IE ___________.

increases

decreases

constant

i am not sure

What type of reaction is shown in the reaction pathway?

endothermic reaction

exothermic reaction

ΔH value in an endothermic reaction is a positive number.

True

False

The enthalpy of combustion can be described as

When 1 mole of solute dissolves in water

When 1 mole of substance is fully combusted in oxygen

1 one mole of water is produced in a neutralisation reaction

Which electron configuration belongs to Chlorine (Cl)?

1s²2s²2p⁶3s²3p⁵

1s²2s²2p⁶3s²3p⁶

1s²2s²2p⁶3s²3p⁷

Put the following in order of increasing ionization energy:Neon, Lithium, Carbon

Lithium, Carbon, Neon

Carbon, Lithium, Neon

Neon, Carbon, Lithium

Lithium, Neon, Carbon

C+ O₂ --> CO₂ + 60kJ

what is the ΔH for the reaction?

+60

-60

there is no way to know

Which symbol represents Enthalpy change?

ΔH

ΔT

ΔG

ΔS

Which of these decreases down Group 2?

First ionisation energy

Atomic radius

Number of protons

Reactivity with water

10.

The diagram shows how a property of Period 3 elements varies across the period. What is the property?

Atomic radius

Electronegativity

First ionisation energy

Melting point

11.

Electronegativity is...

how good an atom is at attracting electrons

the ability of an atom to lose electrons

the energy required to remove an electron from a specific atom

how easy it is to make friends.

12.

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

Zinc

Copper

Nickel

Germanium

13.

During oxidation process electrons are

Lost

Gained

Paired up

Remains same

14.

Match the definition below to the correct term.

The enthalpy change that takes place when one mole of a compound is formed from its elements in their standard states under standard conditions.

The enthalpy of neutralisation

The enthalpy of combustion

The enthalpy of formation

The enthalpy of reaction

15.

The electronegativity of bromine is ____ than Chlorine because of ____.

larger, more energy levels

larger, less energy levels

smaller, more energy levels

smaller, less energy levels

16.

What is the molecular geometry of H₂O?

Bent

Linear

Trigonal Planar

Trigonal Bipyrimidal

17.

A low pH means that ____.

It has no detectable H⁺ or OH^- ions.

It has equal concentrations of H⁺and OH^- ions.

It has high concentrations of H⁺ ions.

It has equal concentrations of positive and negative ions.

18.

The correct electronic configuration of Cr (Z=24) is

[Ar] 3d⁵ 4s ¹

[Ar] 3d⁴ 4s 2

[Ar] 3d⁹ 4s²

[Ar] 3d¹⁰ 4s ¹

19.

Which of the following forms a molecular solid when solidified ?

Calcium fluoride

Silicon dioxide

Carbon dioxide

Sodium chloride

20.

Define standard enthalpy of combustion.

Heat released when one mole of substance is burnt completely in excess oxygen.

Heat absorbed when one mole of substance is burnt completely in excess oxygen under standard state.

Heat released when one mole of substance is burnt completely in excess oxygen under standard conditions with all substances being in their standard states.

Heat change when one mole of substance is burnt partially in excess oxygen under standard state.

21.

How do the following two elements bond together?

Al³⁺ O^2-

AlO

Al₂O₃

Al₃O₆

Al₃O₂

22.

Which ion, in aqueous solution, forms a white precipitate when dilute sulfuric acid is added?

Ag+

Ba2+

Cu2+

Fe2+

23.

How do you calculate Enthalpy of a reaction?

ΔH = ΔH_products- ΔH_reactants

ΔT = q / mC

ΔG = ΔH -TΔS

E = mc²

24.

What do we mean by the term standard conditions

1atm, 20C and 1moldm³

1atm, 0K and 1moldm³

10atm, 273K and 10mol/dm³

100kPa, 298K and 1mol/dm³

25.

Match the definition to the correct term.

The enthalpy change that accompanies a reaction in the molar quantities shown in a chemical reaction under standard conditions with all reactants and products in their standard states.